HUMMINBIRD 858c DI Combo Color GPS Fishing System Instruction Manual

June 12, 2024
Humminbird

858c DI Combo Color GPS Fishing System

Product Information

This product is an electronic chart designed to aid navigation
by facilitating the use of authorized government charts. It should
not be used as a replacement for official government charts and
notices to mariners, which contain all the necessary information
for safe navigation. The captain is responsible for the prudent use
of this device.

It is important to note that this device should not be relied
upon as a navigational aid to prevent collision, grounding, boat
damage, or personal injury. Water depth can change rapidly while
the boat is in motion, and there may not be enough time to react.
Always operate the boat at very slow speeds if there is a suspicion
of shallow water or submerged objects.

Disassembly and repair of this electronic unit should only be
performed by authorized service personnel. Unauthorized individuals
attempting to modify the serial number or repair the original
equipment or accessories will void the warranty.

This product contains chemicals known to the State of California
to cause cancer and/or reproductive harm. Take necessary
precautions while handling and using the product.

It is recommended to remove the unit cover before traveling at
speeds above 20 mph to avoid any potential damage. High-speed
travel with the cover installed may compromise the unit’s
functionality.

Please note that some features discussed in the manual may
require a separate purchase, and certain features are only
available on international models. Carefully read the manual to
fully understand your model’s capabilities.

For a list of authorized international distributors, visit our
website at www.humminbird.com or contact our
Customer Resource Center at 334-687-6613.

Product Usage Instructions

How Sonar Works

To understand how sonar works, refer to the relevant section in
the manual.

DualBeam PLUSTM Sonar (858c, 898c SI, 958c, 998c SI)

For information on DualBeam PLUSTM Sonar, refer to the relevant
section in the manual.

QuadraBeam PLUSTM Sonar (optional-purchase QuadraBeam PLUSTM

transducer only)

If you have purchased the optional QuadraBeam PLUSTM transducer,
refer to the relevant section in the manual for instructions on
using QuadraBeam PLUSTM Sonar.

Universal Sonar 2

To understand how to use Universal Sonar 2, refer to the
relevant section in the manual.

How GPS and Cartography Work

To learn about the functioning of GPS and cartography on this
device, refer to the relevant section in the manual.

Fishing System Configuration

For instructions on configuring the fishing system, please refer
to the relevant section in the manual.

Accessory Bus

Information on the accessory bus can be found in the
corresponding section of the manual.

Video-Out and RS 232 Connectors

To understand how to use the video-out and RS 232 connectors,
please refer to the relevant section in the manual.

Installation Overview

Control Head Installation

Refer to the installation instructions provided in the manual
for guidance on installing the control head.

Gimbal Mounting the Control Head

Follow the instructions in the manual for proper gimbal mounting
of the control head.

Connecting the Control Head Power Cable to the Boat

Instructions on how to connect the control head power cable to
the boat can be found in the manual.

Transducer Installation Overview

858c & 958c Inside the Hull Transducer Installation

For information on installing the inside the hull transducer for
the 858c and 958c models, please refer to the relevant section in
the manual.

DualBeam PLUSTM Transducer, XNT 9 20 T (858c and 958c

only)

To install the DualBeam PLUSTM transducer, XNT 9 20 T, on the
858c and 958c models, follow the instructions provided in the
manual.

Thank You!
Thank you for choosing Humminbird®, America’s #1 name in fishfinders. Humminbird® has built its reputation by designing and manufacturing top- quality, thoroughly reliable marine equipment. Your Humminbird® is designed for trouble-free use in even the harshest marine environment. In the unlikely event that your Humminbird® does require repairs, we offer an exclusive Service Policy – free of charge during the first year after purchase, and available at a reasonable rate after the one-year period. For complete details, see the Warranty section in this manual. We encourage you to read this installation and operations manual carefully in order to get full benefit from all the features and applications of your Humminbird® product.
Contact our Customer Resource Center at either 1-800-633-1468 or visit our web site at humminbird.com.
WARNING! This electronic chart is an aid to navigation designed to facilitate the use of authorized government charts, not to replace them. Only official government charts and notices to mariners contain all of the current information needed for the safety of navigation, and the captain is responsible for their prudent use.
WARNING! This device should not be used as a navigational aid to prevent collision, grounding, boat damage, or personal injury. When the boat is moving, water depth may change too quickly to allow time for you to react. Always operate the boat at very slow speeds if you suspect shallow water or submerged objects.
WARNING! Disassembly and repair of this electronic unit should only be performed by authorized service personnel. Any modification of the serial number or attempt to repair the original equipment or accessories by unauthorized individuals will void the warranty.
WARNING! This product contains chemicals known to the State of California to cause cancer and/or reproductive harm.

WARNING! Do not travel at high speed with the unit cover installed. Remove the unit cover before traveling at speeds above 20 mph.
NOTE: Some features discussed in this manual require a separate purchase, and some features are only available on international models. Every effort has been made to clearly identify those features. Please read the manual carefully in order to understand the full capabilities of your model.
ATTENTION INTERNATIONAL CUSTOMERS: Products sold in the U.S. are not intended for use in the international market. Humminbird® international units provide international features and are designed to meet country and regional regulations. Languages, maps, time zones, units of measurement, and warranty are examples of features that are customized for Humminbird® international units purchased through our authorized international distributors.
To obtain a list of authorized international distributors, please visit our web site at www.humminbird.com or contact our Customer Resource Center at 334-687-6613.
XM WX® is a registered trademark of XM Satellite Radio and Weather to the Power of X® is a registered trademark of XM Satellite Radio Inc. All rights reserved.
ProMapTM and LakeMaster® are trademarked by or registered trademarks of Waypoint Technologies, Inc.
Navionics® Gold, HotMapsTM, and HotMapsTM Premium, Navionics® Classic Charts, and PlatinumTM Cartography are trademarked by or registered trademarks of Navionics®.
800 SeriesTM, 900 SeriesTM, Cannon®, CannonLinkTM, Contour XDTM, Down ImagingTM, DualBeam PLUSTM, Fish ID+TM, HumminbirdPCTM, Humminbird®, InterLinkTM, One-Touch® Zoom, QuadraBeam PLUSTM, RTSTM Window, Side Imaging®, SmartCast®, SwitchFireTM, Structure ID®, Total Screen UpdateTM, UniMapTM, WeatherSense®, WhiteLineTM, and X-PressTM Menu are trademarked by or registered trademarks of Humminbird®.
© 2010 Humminbird®, Eufaula AL, USA. All rights reserved.

i

Table of Contents

Introduction

1

How Sonar Works ……………………………………………………………………………………………………..1

High Definition Side Imaging® Sonar (898c SI and 998c SI only)……………………………………..2

DualBeam PLUSTM Sonar (858c, 898c SI, 958c, 998c SI)………………………………………………….3

QuadraBeam PLUSTM Sonar (optional-purchase QuadraBeam PLUSTM transducer only) ……….3

Universal Sonar 2……………………………………………………………………………………………………….4

How GPS and Cartography Work ………………………………………………………………………………..4

Fishing System Configuration……………………………………………………………………………………..5

Accessory Bus …………………………………………………………………………………………………………..5

Video-Out and RS 232 Connectors ………………………………………………………………………………6

Installation Overview

6

Control Head Installation

6

Gimbal Mounting the Control Head…………………………………………………………………………….7

Connecting the Control Head Power Cable to the Boat………………………………………………11

Transducer Installation Overview

12

858c & 958c Inside the Hull Transducer Installation

DualBeam PLUSTM Transducer, XNT 9 20 T (858c and 958c only)

24

Locating the transducer mounting location ………………………………………………………………24

Trial installation ……………………………………………………………………………………………………….25

Routing the cable……………………………………………………………………………………………………..26

Permanently mounting the transducer ……………………………………………………………………..26

898c SI & 998c SI Transom Mount Transducer Installation

Side Imaging Transducer, XHS 9 HDSI 180T (898c SI or 998c SI only)

27

Overview ………………………………………………………………………………………………………………….28

Locating transducer mounting location ……………………………………………………………………..28

Mounting the transducer bracket to the boat…………………………………………………………….29

Attaching the pivot to the transducer ……………………………………………………………………….30

Mounting the transducer pivot assembly to the bracket …………………………………………….30

Adjusting the running position of the transducer……………………………………………………….31

Routing the cable……………………………………………………………………………………………………..32

Testing the installation …………………………………………………………………………………………….33

858c & 958c Transom Mount Transducer Installation

DualBeam PLUSTM Transducer, XNT 9 20 T (858c and 958c only)

13

Overview ………………………………………………………………………………………………………………….13

Locating the transducer mounting location………………………………………………………………..14

Preparing the Mounting Location …………………………………………………………………………….15

Assembling the Transducer and Initial Mounting……………………………………………………….16

Routing the Cable ……………………………………………………………………………………………………20

Test and Finish the Installation………………………………………………………………………………….21

Locking Down the Transducer (Optional)……………………………………………………………………23

Trolling Motor Transducer Installation

33

Trolling Motor Transducer Options …………………………………………………………………………….33

Test and Finish the Transducer Installation ………………………………………………………………..33

GPS Receiver Installation Overview

34

Stem Mounting with an Existing 1″ – 14 Thread Stem………………………………………………..35

Access Under Mounting Location …………………………………………………………………………….36

No Access Under Mounting Location ……………………………………………………………………….36

Finish Routing the Cable and Check GPS Receiver Operation……………………………………..37

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Table of Contents

Testing the System Installation

38

Sonar Bottom Presentation……………………………………………………………………………………….47

Power On the Control Head

39

What’s on the Control Head

39

Key Functions

40

POWER/LIGHT Key……………………………………………………………………………………………………40

VIEW Key ………………………………………………………………………………………………………………..40

MENU Key ………………………………………………………………………………………………………………40

4-WAY Cursor Control Key (RIGHT, LEFT, UP, or DOWN Cursor Keys) …………………………..41

VIEW PRESET Keys ………………………………………………………………………………………………….41

EXIT Key ………………………………………………………………………………………………………………….41

INFO Key ………………………………………………………………………………………………………………..42

MARK Key………………………………………………………………………………………………………………..42

GOTO Key ………………………………………………………………………………………………………………..42

ZOOM (+/-) Keys ……………………………………………………………………………………………………..42

Multi-Media Card (MMC)/SD Slots

43

Add Maps to Your Fishing System …………………………………………………………………………….43

Update Software ……………………………………………………………………………………………………..44

Export Navigation Data …………………………………………………………………………………………….44

What’s on the Sonar Display

45

Understanding the Sonar Display………………………………………………………………………………46

Real Time Sonar (RTSTM) Window …………………………………………………………………………….46

SwitchFireTM …………………………………………………………………………………………………………….46

Freeze Frame and Active Cursor ………………………………………………………………………………..47

Instant Image Update ………………………………………………………………………………………………47

What’s on the Side Imaging® Display (898c SI and 998c SI only)

48

Understanding the Side Imaging® Display ………………………………………………………………..49

Side Imaging® Frequencies and Coverage………………………………………………………………….50

For Best Performance ………………………………………………………………………………………………51

On the Water Interpretation ……………………………………………………………………………………..51

Views

53

Side Imaging® View (898c SI and 998c SI only) …………………………………………………………..55

Down ImagingTM View (898c SI and 998c SI only) ……………………………………………………….56

Sonar View ………………………………………………………………………………………………………………57

Sonar Zoom View……………………………………………………………………………………………………..58

Split Sonar View……………………………………………………………………………………………………….59

Snapshot and Recording View (optional-purchase MMC/SD card required) ……………………60

Side Beam View (optional-purchase QuadraBeam PLUSTM transducer required) ………………65

Bird’s Eye View…………………………………………………………………………………………………………67

Chart View ………………………………………………………………………………………………………………68

Combo Views …………………………………………………………………………………………………………..69

Combo Views: Functions …………………………………………………………………………………………..69

Side Imaging/Sonar Combo View (898c SI and 998c SI only) ……………………………………….69

Chart/Bird’s Eye Combo View……………………………………………………………………………………70

Chart/Chart Combo View …………………………………………………………………………………………70

Chart/Sonar Combo View …………………………………………………………………………………………71

Chart/Side Imaging Combo View (898c SI and 998c SI only) ……………………………………….71

Down ImagingTM/Side Imaging® Combo View (898c SI and 998c SI only) ……………………..72

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Table of Contents

Chart/Down ImagingTM Combo View (898c SI and 998c SI only) ………………………………….72 Down ImagingTM/Sonar Combo View (898c SI and 998c SI only) ………………………………….73 Down ImagingTM/Side Imaging/Sonar Combo View (898c SI and 998c SI only) …………….73 View Orientation ……………………………………………………………………………………………………..74

Viewing Cartography

74

Introduction to Navigation

76

Waypoints, Routes, and Tracks………………………………………………………………………………….76

Save, Edit, or Delete a Waypoint ………………………………………………………………………………77

Navigate to a Waypoint or Position …………………………………………………………………………..78

Add a Waypoint Target or Trolling Grid ……………………………………………………………………..78

Save, Edit or Delete a Route……………………………………………………………………………………..79

Save or Clear a Current Track ……………………………………………………………………………………80

Edit, Delete, or Hide Saved Tracks …………………………………………………………………………….80

Man Overboard (MOB) Navigation…………………………………………………………………………….81

The Menu System

82

Start-Up Options Menu

82

Simulator ………………………………………………………………………………………………………………..83

System Status …………………………………………………………………………………………………………83

Self Test ………………………………………………………………………………………………………………….83

Accessory Test …………………………………………………………………………………………………………84

GPS Diagnostic View ………………………………………………………………………………………………..84

X-PressTM Menu

85

Main Menu

85

Quick Tips for the Main Menu ………………………………………………………………………………….86 Note for all Menu Settings ……………………………………………………………………………………….86 User Mode (Normal or Advanced) …………………………………………………………………………….87

Sonar X-PressTM Menu

88

Active Side (Combo Views only)………………………………………………………………………………….88

Split Position (Combo Views only) ………………………………………………………………………………88

Sensitivity ………………………………………………………………………………………………………………..89

Upper Range (Advanced: Sonar, Split Sonar and Active Sonar Side Views only) ………………89

Lower Range …………………………………………………………………………………………………………..90

Chart Speed …………………………………………………………………………………………………………….90

Quad Layout (with optional-purchase QuadraBeam PLUSTM Transducer, Side Beam View only) …………90

Bottom Lock (Sonar Zoom View only) …………………………………………………………………………91

Bottom Range (Sonar Zoom View only, when Bottom Lock is On) ………………………………….91

Cancel Navigation (only when Navigating) ………………………………………………………………….91

Side Imaging® X-PressTM Menu

(Side Imaging Views only [898c SI, 998c SI])

92

Active Side (Combo Views only)………………………………………………………………………………….92

Split Position (Combo Views only) ………………………………………………………………………………92

SI Side……………………………………………………………………………………………………………………..93

SI Sensitivity…………………………………………………………………………………………………………….93

SI Enhance ………………………………………………………………………………………………………………93

SI Range ………………………………………………………………………………………………………………….94

Chart Speed …………………………………………………………………………………………………………….94

SI Colors ………………………………………………………………………………………………………………….94

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Table of Contents

Down ImagingTM X-PressTM Menu

(Down ImagingTM Views only [898c SI, 998c SI])

95

Active Side (Combo Views only)………………………………………………………………………………….95

Split Position (Combo Views only) ………………………………………………………………………………95

Down Sensitivity ……………………………………………………………………………………………………..96

Upper Range (Advanced: Down ImagingTM Views only) ………………………………………………..96

Lower Range …………………………………………………………………………………………………………..97

Chart Speed …………………………………………………………………………………………………………….97

SI Colors ………………………………………………………………………………………………………………….97

Cancel Navigation (only when Navigating) ………………………………………………………………….97

Navigation X-PressTM Menu

98

Active Side (Combo Views only)………………………………………………………………………………….98

Split Position (Combo Views only) ………………………………………………………………………………98

Waypoint [Name] (Only with an active cursor on a waypoint) ……………………………………….99

Cursor to Waypoint (Chart or Combo View only)…………………………………………………………..99

Save Current Track……………………………………………………………………………………………………99

Clear Current Track ………………………………………………………………………………………………….99

Save Current Route (only when Navigating) ………………………………………………………………100

Skip Next Waypoint (only when Navigating)………………………………………………………………100

Cancel Navigation (only when Navigating) ………………………………………………………………..100

Cancel MOB Navigation (only when MOB Navigation is activated)………………………………100

Remove Target (only if a Target is Active) ………………………………………………………………….100

Remove Grid (only if a Grid is Active) …………………………………………………………………………100

Waypoint [Name] (Most recently-created waypoint)……………………………………………………101

Snapshot and Recording X-PressTM Menu

(Snapshot and Recording View only)

102

Start Recording (optional-purchase MMC/SD Card, Snapshot and Recording View only) ……………………….102

Stop Recording (optional-purchase MMC/SD Card only) ………………………………………………102

Delete Image (optional-purchase MMC/SD Card, Snapshot and Recording View only) ……..102

Delete All Images (optional-purchase MMC/SD Card, Snapshot and Recording View only)……………………….103

Delete Recording (optional-purchase MMC/SD Card, Snapshot and Recording View only)……………………….103

Delete All Recordings (optional-purchase MMC/SD Card, Snapshot and Recording View only)……………………….103

Pings Per Second (optional-purchase MMC/SD Card, Snapshot and Recording View only)……………………….103

Playback Speed (optional-purchase MMC/SD Card, Snapshot and Recording View only)……………………….103

Stop Playback (optional-purchase MMC/SD Card only) ………………………………………………..104

Alarms Menu Tab

105

Depth Alarm …………………………………………………………………………………………………………..105

Fish ID Alarm …………………………………………………………………………………………………………105

Low Battery Alarm………………………………………………………………………………………………….106

Aux. Temp Alarm (with optional-purchase temp. probe or Temp/Speed only) ………………..106

Temp. Alarm …………………………………………………………………………………………………………..106

Off Course Alarm ……………………………………………………………………………………………………106

Arrival Alarm…………………………………………………………………………………………………………..107

Drift Alarm …………………………………………………………………………………………………………….107

Alarm Tone …………………………………………………………………………………………………………….107

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Table of Contents

Sonar Menu Tab

108

Beam Select …………………………………………………………………………………………………………..108

Side View Frequency (Side Imaging® and Down ImagingTM Views only [898c SI, 998c SI]) …………………………..109

Surface Clutter ……………………………………………………………………………………………………….109

SwitchFireTM …………………………………………………………………………………………………………..109

Fish ID+TM………………………………………………………………………………………………………………110

Fish ID Sensitivity……………………………………………………………………………………………………110

Real Time Sonar (RTSTM) Window …………………………………………………………………………..111

Sonar Colors …………………………………………………………………………………………………………..111

Bottom View…………………………………………………………………………………………………………..111

Zoom Width (Sonar Zoom View only) ……………………………………………………………………….112

83 kHz Sensitivity (Advanced) ………………………………………………………………………………….112

455 kHz Sensitivity (Advanced, with optional purchase QuadraBeam PLUSTM transducer) …………………………….112

Depth Lines (Advanced) …………………………………………………………………………………………..113

Noise Filter (Advanced) …………………………………………………………………………………………..113

Max Depth (Advanced)…………………………………………………………………………………………….114

Water Type (Advanced) …………………………………………………………………………………………..114

Transducer Select……………………………………………………………………………………………………114

Color Bar………………………………………………………………………………………………………………..115

Temperature Graph (Sonar View only, with Temperature input) ……………………………………115

Down ImagingTM Beam Width (Advanced)………………………………………………………………..115

Navigation Menu Tab

116

Current Track …………………………………………………………………………………………………………116

Saved Tracks…………………………………………………………………………………………………………..117

Waypoints………………………………………………………………………………………………………………117 Routes……………………………………………………………………………………………………………………118 Chart Orientation ……………………………………………………………………………………………………118 North Reference……………………………………………………………………………………………………..118 Waypoint Decluttering (Advanced) …………………………………………………………………………..118 Trolling Grid Rotation………………………………………………………………………………………………119 Trackpoint Interval ………………………………………………………………………………………………….119 Track Min Distance (Advanced) ………………………………………………………………………………..119 Track Color Range ………………………………………………………………………………………………….119 Map Datum (Advanced) …………………………………………………………………………………………..120 Course Projection Line…………………………………………………………………………………………….120 3D View Outline ……………………………………………………………………………………………………..120 Export All Nav Data (Advanced) ………………………………………………………………………………120 Delete All Nav Data (Advanced) ………………………………………………………………………………120 Continuous Navigation Mode………………………………………………………………………………….120 GPS Receiver Override (Advanced) …………………………………………………………………………..120

Chart Menu Tab

121

Lat/Lon Grid …………………………………………………………………………………………………………..121

Navaids on Bird’s Eye View……………………………………………………………………………………..121

Chart Select …………………………………………………………………………………………………………..121

Set Simulation Position (Advanced) …………………………………………………………………………122

Set Map Offset (Advanced) ……………………………………………………………………………………..122

Clear Map Offset (Advanced)……………………………………………………………………………………122

Shaded Depth ……………………………………………………………………………………………………….122

Chart Detail Level (optional-purchase Navionics® charts only) ……………………………………..123

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Table of Contents

Map Borders…………………………………………………………………………………………………………..123 Spot Soundings (optional-purchase Navionics® charts only)…………………………………………123 NVB Chart Preference …………………………………………………………………………………………..124 Contour Lines (optional- purchase LakeMaster® charts only) …………………………………………124 Depth Colors (optional- purchase LakeMaster® charts only)…………………………………………..124 Depth Highlight (optional-purchase LakeMaster® charts only) ……………………………………..124 Depth Highlight Range (+/-) (optional-purchase LakeMaster® charts only) ……………………124 Water Level Offset (optional-purchase LakeMaster® charts only)………………………………….124 Shallow Water Highlight (optional-purchase LakeMaster® charts only)…………………………125 Lake List (optional-purchase LakeMaster® charts only) ………………………………………………..125

Setup Menu Tab

126

Units – Depth …………………………………………………………………………………………………………126

Units – Temp (International only) ………………………………………………………………………………126

Units – Distance (with Speed input only) ……………………………………………………………………126

Units – Speed (with Speed input only) ……………………………………………………………………….127

User Mode …………………………………………………………………………………………………………….127

Language (International only)……………………………………………………………………………………127

Triplog Reset (with Speed input only) ……………………………………………………………………….127

Restore Defaults……………………………………………………………………………………………………..127

Select Readouts (Advanced) ……………………………………………………………………………………128

Depth Offset (Advanced) …………………………………………………………………………………………129

Aux. Temp Offset (Advanced)……………………………………………………………………………………129

Temp. Offset (Advanced) …………………………………………………………………………………………129

Speed Calibration (Advanced, with Speed paddlewheel only) ……………………………………..129

Local Time Zone (Advanced) ……………………………………………………………………………………129 Daylight Saving Time (Advanced) …………………………………………………………………………….129 Position Format (Advanced) ……………………………………………………………………………………..130 Time Format (Advanced, International only)………………………………………………………………..130 Date Format (Advanced, International only)………………………………………………………………..130 Digits Format (Advanced)…………………………………………………………………………………………130 NMEA Output (Advanced) ……………………………………………………………………………………….130 Sonar……………………………………………………………………………………………………………………..131 Demonstration ……………………………………………………………………………………………………….131 Sound Control ……………………………………………………………………………………………………….131 Video Out ………………………………………………………………………………………………………………131

Views Menu Tab

132

Accessories Menu Tab

132

Screen Snapshot (optional-purchase MMC/SD Cards only) …………………………………………133

AIS (optional-purchase AIS equipment only) ………………………………………………………………133

Troubleshooting

136

Fishing System Doesn’t Power Up …………………………………………………………………………..136

Fishing System Defaults to Simulator with a Transducer Attached …………………………..136

Display Problems

137

Finding the Cause of Noise

138

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Table of Contents

1-Year Limited Warranty

139

Humminbird® Service Policy

139

Fishing System Accessories

141

Specifications

142

Glossary

144

Appendix A

Side Imaging® Transducer Mounting Template (XHS 9 HDSI 180 T)

149

Contact Humminbird®

150

NOTE: Entries in this Table of Contents which list (International Only) are only available on products sold outside of the U.S. by our authorized international distributors. To obtain a list of authorized international distributors, please visit our web site at humminbird.com or contact our Customer Resource Center at 334-687-6613.
NOTE: Some of the entries in this Table of Contents may require the purchase of separate accessories. You can visit our web site at humminbird.com to order these accessories online or contact our Customer Resource Center at 1-800-633-1468.

viii

Introduction
Your Humminbird® Fishing System is configured as follows:
· Humminbird® 858c Combo: Wide Screen Fishing System with DualBeam PLUSTM Sonar and Chartplotting. GPS Receiver included.
· Humminbird® 898c SI Combo: Wide Screen Fishing System with Side Imaging® Sonar, DualBeam PLUSTM Sonar, and Chartplotting. GPS Receiver included.
· Humminbird® 958c Combo: Ultra Wide Screen Fishing System with DualBeam PLUSTM Sonar and Chartplotting. GPS Receiver included.
· Humminbird® 998c SI Combo: Ultra Wide Screen Fishing System with Side Imaging® Sonar, DualBeam PLUSTM Sonar, and Chartplotting. GPS Receiver included.
How Sonar Works
Sonar technology is based on sound waves. The Fishing System uses sonar to locate and define structure, bottom contour and composition, as well as depth directly below the transducer.
Your Fishing System sends a sound wave signal and determines distance by measuring the time between the transmission of the sound wave and when the sound wave is reflected off of an object; it then uses the reflected signal to interpret location, size, and composition of an object.
Sonar is very fast. A sound wave can travel from the surface to a depth of 240 ft (70 m) and back again in less than 1/4 of a second. It is unlikely that your boat can “outrun” this sonar signal.
1

SONAR is an acronym for SOund and NAvigation Ranging. Sonar utilizes precision sound pulses or “pings” which are emitted into the water in a teardrop-shaped beam. The sound pulses “echo” back from objects in the water such as the bottom, fish and other submerged objects. The returned echoes are displayed on the LCD screen. Each time a new echo is received, the old echoes are moved across the LCD, creating a scrolling effect.
When all the echoes are viewed side by side, an easy to interpret “graph” of the bottom, fish and structure appears.
Introduction

Introduction

The sound pulses are transmitted at various frequencies depending on the application. Very high frequencies (455 kHz) are used for greatest definition, but the operating depth is limited. High frequencies (200 kHz) are commonly used on consumer sonar and provide a good balance between depth performance and resolution. Low frequencies (83 kHz) are typically used to achieve greater depth capability.
The power output is the amount of energy generated by the sonar transmitter. It is commonly measured using two methods:
· Root Mean Square (RMS) measures power output over the entire transmit cycle.
· Peak to Peak measures power output at the highest points.
The benefits of increased power output are the ability to detect smaller targets at greater distances, ability to overcome noise, better high speed performance and enhanced depth capability.
2

86° 455kHz

86° 455kHz

20° 200kHz
60° 83kHz

High Definition Side Imaging® Sonar
(898c SI and 998c SI only)
The 898c SI Combo and 998c SI Combo use Side Imaging® sonar to provide a wide yet precise survey of a large area of water, including detailed bottom topography and fish-attracting structure orientation. The Side Imaging® transducer returns are processed into an image similar to an aerial photograph.
Typically, the Side Imaging® sonar can search an area that is 480 feet wide (240 to each side), with a typical depth performance of 150 feet when the Side Imaging® Sonar frequency is set for 455kHz. The side beams can be operated at one of two frequencies: 455 kHz or 800 kHz. Selecting 800 kHz produces the sharpest image, but the search area to each side and the depth capability are limited as compared to the 455 kHz frequency. See What’s on the Side Imaging® Display and Understanding Side Imaging® for more information.

DualBeam PLUSTM Sonar
(858c, 898c SI, 958c, 998c SI)
The Fishing System uses a 200/83 kHz DualBeam PLUSTM sonar system with a wide (60°) area of coverage. DualBeam PLUSTM sonar has a narrowly focused 20° center beam, surrounded by a second beam of 60°, expanding your coverage to an area equal to your depth. In 20 feet of water, the wider beam covers an area 20 feet wide.
DualBeam PLUSTM sonar returns can be blended together, viewed separately, or compared side-by-side. DualBeam PLUSTM is ideal for a wide range of conditions – from shallow to very deep water in both fresh and salt water. Depth capability is affected by such factors as boat speed, wave action, bottom hardness, water conditions, and transducer installation.

35°
455 kHz

60° 20°
200 kHz

83 kHz

35°
455 kHz

90° Total Coverage Bottom Coverage = 2 x Depth

QuadraBeam PLUSTM Sonar
(optional-purchase QuadraBeam PLUSTM
transducer only)
Your Fishing System supports the optional-purchase QuadraBeam PLUSTM transducer. QuadraBeam PLUSTM sonar provides a wide (90°) area of coverage. QuadraBeam PLUSTM starts with two fan-shaped 35° 455 kHz Side Structure locating sonar beams to spot fish, bait, and structure to the left and right of the boat over an area of the bottom that’s always equal to twice your depth.

For a detailed view below the boat, QuadraBeam PLUSTM uses DualBeam PLUSTM technology, with precision 20° and wide 60° beams. QuadraBeam PLUSTM finds more fish faster, and can even tell you where to put your bait by showing if fish are to the left, right, or directly beneath your boat.

3

Introduction

Universal Sonar 2
Your Fishing System supports Universal Sonar 2, a state-of-the-art, integrated and protected transducer that is built into the lower unit of Minnkota trolling motors. With Universal Sonar 2, all wiring is concealed inside the indestructible composite shaft–out of sight and out of harm’s way, with no clamps, ties, or exposed wires. Universal Sonar 2 features new temperature sensing and the performance of DualBeam PLUSTM technology. An expanded view and greater bottom detail gives you a totally new perspective of the water below, along with optimal sonar performance to help you find fish.
How GPS and Cartography Work
Your Fishing System also supports GPS (Global Positioning System) and chartplotting. It uses GPS and sonar to determine your position, display it on a grid, and provide detailed underwater information.
GPS uses a constellation of satellites that continually send radio signals to the earth. The GPS receiver on your boat receives signals from satellites that are visible to it. Based on time differences between each received signal, the GPS receiver determines its distance to each satellite. With distances known, the GPS receiver mathematically triangulates its own position. With once per second updates, the GPS receiver then calculates its velocity and bearing.

GPS was originally intended for military use; however, civilians may also take advantage of its highly accurate position capabilities, typically within +/- 4.5 meters, depending on conditions. This means that 95% of the time, the GPS receiver will read a location within 4.5 meters of your actual position. Your GPS Receiver also uses information from WAAS (the Wide Area Augmentation System), EGNOS (the European Geostationary Navigation Overlay Service), and MSAS (the MTSAT Satellite Augmentation System) satellites if they are available in your area.
The following GPS functionality is currently supported by the Fishing System when it is connected to the included GPS receiver:
· View current position
· View current track (breadcrumb trail)
· View precision speed and heading from your GPS receiver
· Save tracks, waypoints, and routes
· Travel a route and navigate from one waypoint to the next.
See Chart View and Introduction to Multi-Media Card (MMC)/SD Slots: Add Maps to Your Fishing System for more information.

Introduction

4

The Fishing System has a wide variety of configurations

6

2

1

3

4

5
1 Video Out 2 RS 232 Connector 3 Power 4 Temperature 5 Speed

10
8 7
9
Optional “Y” Cable 6 GPS Receiver 7
SmartCast® Wireless Sonar Link 8 WeatherSense® 9
Sonar Transducer with Temperature 10

Fishing System Configuration
The Fishing System has a wide variety of configurations that will influence the installation. The accessory bus, video output, and RS 232 connectors allow you to expand your Fishing System capabilities. As you expand the configuration, the menu options that correspond with the connected accessory will be added to the menu system.
Please read all instructions that are relevant for your configuration before beginning the installation process.

Accessory Bus
Use the Accessory Bus to expand the functionality of your Fishing System. Accessories plug directly into the Fishing System and enable advanced features such as WeatherSense®, SmartCast®, and the AS WX 1 Satellite Weather Receiver.

Accessory Bus

When an accessory is plugged into the Fishing System, additional functions will be added to the menu system automatically. See Accessories Menu Tab and Fishing System Accessories in this manual. Also, see the accessory’s operations manual for additional details.

NOTE: Accessories to enable WeatherSense®, SmartCast®, and the AS WX 1 Satellite Weather Receiver require separate purchases. Visit our web site at humminbird.com or contact our Customer Resource Center at 1-800-633-1468 for details.

5

Installation Introduction

Video-Out and RS 232 Connectors
Your unit has a built-in Video Out connector and a dual RS 232 connector, which can be used with optional-purchase equipment such as AIS (Automatic Identification System). If you purchase a video monitor and attach it to your control head using the Video Out connector, your unit will send a video signal if it detects a monitor. See Setup Menu Tab: Video Out for more information.

12

3 45 6

Installation Overview
Inside the boat there is often a channel or conduit used for other wiring, this can be used to route cables. Be sure to route the cable as far as practical from the antenna cable of VHF radios or tachometer cables to reduce the possibility of interference. The transducer and GPS receiver cables should not be cut, and care should be used not to damage the cable insulation. Basic installation tasks that you must perform include:
· Installing the control head (choose gimbal or in-dash mounting, where in- dash mounting requires a separate purchase)
· Installing the transducer (choose the installation method that matches your transducer)
· Installing the GPS Receiver (if included) · Testing the complete installation and locking the transducer position
NOTE: Accessories may require a separate purchase. You can visit our web site at humminbird.com to order these accessories online or contact our Customer Resource Center at 1-800-633-1468.

1 RS 232 2 Video Output 3 Power

Temp/Speed 4 Communications/GPS 5
Transducer 6

NOTE: Accessories connected to the RS 232 or Video-Out connectors require a separate power source.

Control Head Installation
You have two choices for mounting your control head, Gimbal mounting, where you use a surface on the boat, such as the dash, to mount the control head so that it can be tilted up or down, or In-dash mounting, which requires a separate purchase.

Installation Introduction

6

Gimbal Mounting the Control Head
If you are gimbal mounting the Humminbird®, you can pre-assemble the unit in order to plan the best mounting location.
1 2
3
1 Washer 2 Gimbal Knob 3 Gimbal Bracket
In addition to the hardware supplied with your control head, you will need a powered hand drill and various drill bits, various hand tools, including a Phillips head screwdriver, a socket wrench and a flat head screwdriver, a marker or pencil, safety glasses and dust mask, and marine-grade silicone sealant.
1. Place the control head into the gimbal bracket. Make sure that the straight side of the gimbal arm is against the back side of the control head.

2. Place a 1″ (25 mm) diameter black washer on the gimbal knob and then thread the knob and washer into the housing. Tighten the gimbal knob to secure the control head to the mount. Repeat step 2 for the other side.
You can now place the control head in various locations to decide which is best for mounting. Rotating the mounting bracket to the top of the control head will allow for overhead mounting. The chosen mounting area should allow for sufficient room so the control head can pivot through the full tilt range and allow for easy removal and installation.
NOTE: You can drill the cable pass hole underneath the gimbal bracket, allowing you to thread the cables through the knock-out holes in the mount; however, if you cannot drill the hole directly under the mounting bracket, then you will need to drill the cable pass hole behind the bracket, and will need to mount the hole cover there instead.
NOTE: When drilling holes in fiberglass hulls, it is best to start with a smaller bit and use progressively larger drill bits to reduce the chance of chipping or flaking the outer coating. Fill all holes with marine grade silicone sealant.
NOTE: You must have underside access to the mounting location to pass the cables through to the surface. Also, make sure that the mounting surface is adequately supported to protect the control head from excessive wave shock and vibration and provide visibility while in operation.
3. After the mounting location has been determined, loosen the gimbal knobs and remove the control head from the gimbal bracket.

7

Installation – Gimbal Mount

NOTE: Alternate hole patterns are available on the gimbal mounting bracket, and may match existing holes on the boat. You may choose to use one of these alternate hole patterns.

4. Place the gimbal bracket in the chosen position on the mounting surface and mark the four mounting screw locations using a pencil or center punch.

NOTE: Go to the installation instructions applicable to your transducer, GPS

Receiver and accessories. Make the required installations and then run the

cables to your control head mounting location. Do not cut any cabling (except the

1

power cable). If your cables are too short, extensions are available from your local

dealer or online from humminbird.com.

3

2

Installation – Gimbal Mount

1 Mounting Screws 2 Washer

Gimbal Mounting Bracket 3

5. Set the gimbal bracket aside and drill the four mounting screw holes using a 5/32″ (4.0 mm) drill bit.

6a. If the cables must pass through a hole directly beneath the mounting bracket, mark and drill an additional 1″ (25 mm) hole centered between the four mounting holes. Route the cables through the 1″ hole. Place the hole cover over the mounting surface hole, then use it to mark the position of the two mounting screws.

8

Remove the hole cover, drill the two mounting holes using a 9/64″ bit. Do not install the hole cover at this time.
6b. If the cables cannot be routed directly beneath the mounting bracket, mark and drill a 1″ (25 mm) hole that will allow you to run the cables close to the bracket. Pass the cables through the 1″ (25 mm) hole, routing the cables through the grommet and pressing the grommet into place. Place the hole cover over the mounting surface hole, then use it to mark the position of the two mounting screws. Remove the hole cover, drill the two mounting holes using a 9/64″ (3.5 mm) bit, fill them with marine-grade silicone, then replace the hole cover and insert the #8 Phillips countersink wood screws. Hand-tighten only.
7. Place the mounting bracket on the mounting surface aligned with the drilled holes and fill the mounting holes with marine grade silicone. Insert the four #10 Slotted-Hex wood screws into the mounting holes. Hand-tighten only.
8. If the cable pass through-hole is beneath the mounting bracket, you will need to install the hole cover. Place the hole cover over the mounting bracket cable pass through-hole and align with holes drilled in step 6a. Insert the #8 Phillips countersink wood screws. Hand tighten only.
NOTE: Be sure that the cables pass through the slots on the hole cover and that there is enough cable slack to allow for the control head to pivot through its full tilt range. Extra cable slack will also help when connecting/disconnecting the cables.

Cables Routed Directly Beneath Mounting Bracket

2

1

1 Gimbal Bracket 2 Hole Cover

9

Installation – Gimbal Mount

Cables Routed Behind Mounting Bracket 1
3

1 Power 2 Temp/Speed 3 Communications/GPS 4 Transducer 5 Cable Collector Insert

2

1

1 Gimbal Bracket 2 Grommet 3 Hole Cover

9. Insert cable connectors into the proper recesses on the cable

collector insert. The cable connectors are keyed to prevent reverse

installation, so be careful not to force the connectors into the wrong

slots. If you don’t have a cable for every hole in the insert, install the

blank plugs to protect the control head from the weather.

3

Installation – Gimbal Mount

10

123 4
5
2
4 5 1 Cable Collector Insert 2 Screws 3 Cable Collector Cover 4 Tab on Insert 5 Slot on Cover

Plug Cable Connector Assembly to Back of Control Head

10. While holding cables in place in the cable collector insert, thread the cables through the slot in the bottom of the cable collector cover, line up the cable collector insert and cover, then slide the cover into place on the insert.
NOTE: The tab on the Cable Collector insert goes into the slot on the cover.

Connecting the Control Head Power Cable to the Boat
A 6′ (2 m) long power cable is included to supply power to the control head. You may shorten or lengthen the cable using 18 gauge multi-stranded copper wire.
CAUTION: Some boats have 24 or 36 Volt electric systems, but the control head MUST be connected to a 12 VDC power supply.
The control head power cable can be connected to the electrical system of the boat at one of two places: a fuse panel usually located near the console, or directly to the battery.

11. Attach the cable collector insert to the cable collector cover using the 2 Phillips screws provided.

PO ISITIIVVEE

12. Place the control head back onto the mounting bracket. Plug in the cable collector assembly to the back of the control head. Cable connectors and cable sockets are keyed to prevent reverse installation, so be careful not to force the connectors into the wrong sockets. Once the cable collector and all cables are plugged into the back of the control head, lock the assembly into place by threading the knurled screw into the threaded insert on the back of the housing. Adjust the control head to the desired viewing angle and secure by tightening the gimbal knobs.
NOTE: You may wish to dress the cabling with nylon wire ties in order to hold the cables together and create a cleaner assembly.

GRROOUND
NOTE: Make sure that the power cable is disconnected from the control head at the beginning of this procedure. NOTE: Humminbird® is not responsible for over-voltage or over-current failures. The control head must have adequate protection through the proper selection and installation of a 3 amp fuse.

The Humminbird® control head is now ready for operation.

11

Installation – Power

1a. If a fuse terminal is available, use crimp-on type electrical connectors (not included) that match the terminal on the fuse panel. Attach the black wire to ground (-), and the red wire to positive (+) 12 VDC power. Install a 3 amp fuse (not included) for protection of the unit. Humminbird® is not responsible for overvoltage of over-current failures.
or…
1b. If you need to wire the control head directly to a battery, obtain and install an inline fuse holder and a 3 amp fuse (not included) for the protection of the unit. Humminbird® is not responsible for overvoltage or over-current failures.
NOTE: In order to minimize the potential for interference with other marine electronics, a separate power source (such as a second battery) may be necessary.
You are now ready to install the transducer. Find the section that refers to your specific transducer installation method.

Transducer Installation Overview
Proceed to the installation section that matches your transducer type. Your choices are as follows:
· 858c, 958c: DualBeam PLUSTM (XNT 9 20 T), Transom Mount · 858c, 958c: DualBeam PLUSTM (XNT 9 20 T), Inside the Hull Mount · 898c SI, 998c SI: Side Imaging® (XHS 9 HDSI 180T), Transom Mount · All units: Trolling Motor Transducer Installation
NOTE: Due to the wide variety of hulls, only general instructions are presented in this installation guide. Each boat hull represents a unique set of requirements that should be evaluated prior to installation. It is important to read the instructions completely and understand the mounting guidelines before beginning installation.
NOTE: If the included transducer will not work for your application, you may exchange it, NEW and UNASSEMBLED, with mounting hardware included, for a transducer appropriate for your application – often at very little or no charge depending on the transducer. Call the Humminbird® Customer Resource Center at 1-800-633-1468 for details and pricing, or visit humminbird.com.

Installation – Power

12

858c & 958c Transom Mount Transducer Installation
DualBeam PLUSTM Transducer, XNT 9 20 T (858c and 958c only)
The DualBeam PLUSTM transducer uses a Two Piece Kick-up transducer mounting bracket.
NOTE: Due to the wide variety of hulls, only general instructions are presented in this installation guide. Each boat hull represents a unique set of requirements that should be evaluated prior to installation. It is important to read the instructions completely and understand the mounting guidelines before beginning installation.
NOTE: Your transducer may not look exactly like the transducer shown in the illustrations, but it will mount in exactly the same way.

Overview
If you will be installing a DualBeam PLUSTM transom mounted transducer, use the procedures in this section. There are several procedures you will have to perform in order to install a transom-mounted transducer. They are as follows:
· Locate the transducer mounting location · Prepare the mounting location · Assemble the transducer and perform initial mounting · Route the transducer cable · Connect the transducer cable · Perform a final test of the transom transducer installation. In addition to the hardware supplied with your transducer, you will need a powered hand drill and various drill bits, various hand tools, including a ruler or straightedge, a level, a 12″ plumb line (weighted string or monofilament line), marker or pencil, safety glasses and dust mask, and marine-grade silicone sealant.
NOTE: When drilling holes in fiberglass hulls, it is best to start with a smaller bit and use progressively larger drill bits to reduce the chance of chipping or flaking the outer coating.

13

Transom Mount – DualBeam PLUSTM

1. Locating the transducer mounting location
NOTE: If transom mounting is not possible because of a stepped hull or cavitation noise, and you have a single layer fiberglass hull, In-hull installation is an option. See Inside the Hull Transducer Installation for more information.

Turbulence: You must first determine the best location on the transom to install the transducer. It is very important to locate the transducer in an area that is relatively free of turbulent water. Consider the following to find the best location with the least amount of turbulence:

· As the boat moves through the water, turbulence is generated by the weight of the boat and the thrust of the propeller(s) – either clockwise or counter- clockwise. This turbulent water is normally confined to areas immediately aft of ribs, strakes or rows of rivets on the bottom of the boat, and in the immediate area of the propeller(s). Clockwise propellers create more turbulence on the port side. On outboard or inboard/outboard boats, it is best to locate the transducer at least 15″ to the side of the propeller(s).

Areas of Possible Turbulence

Stepped Hull

· The best way to locate turbulence-free water is to view the transom while the boat is moving. This method is recommended if maximum high-speed operation is a high priority. If this is not possible, select a location on the transom where the hull forward of this location is smooth, flat and free of protrusions or ribs.
Level
15″
Find a turbulence-free location at least 15″ from the propeller(s) and not in line with trailer bunks or rollers.

Rivets

Strakes

Step

Transom

Hull

Transom Mount – DualBeam PLUSTM

Deadrise Angle

· On boats with stepped hulls, it may be possible to mount the

transducer on the step. Do not mount the transducer on the transom

behind a step to avoid popping the transducer out of the water at

higher speeds; the transducer must remain in the water for the

Rib

control head to maintain the sonar signal.

14

· If the transom is behind the propeller(s), it may be impossible to find an area clear from turbulence, and a different mounting technique or transducer type should be considered, such as an Inside the Hull Transducer (see Inside the Hull Transducer Installation).
· If you plan to trailer your boat, do not mount the transducer too close to trailer bunks or rollers to avoid moving or damaging the transducer during loading and unloading of the boat.
· If high speed operation is critical, you may want to consider using an In- Hull transducer instead of this Transom Mount transducer.
NOTE: The hydrodynamic shape of your transducer allows it to point straight down without deadrise adjustment.
NOTE: If you cannot find a transom mount location that will work for your highspeed application, find an In-Hull Transducer by contacting our Customer Resource Center at either 1-800-633-1468 or by visiting our web site at humminbird.com.

protrude past the bottom of the hull, and there is at least 1/4″ clearance between the bottom of the bracket and the bottom of the transom for fiberglass boats, and 1/8″ clearance for aluminum boats.

Positioning the Mounting Bracket
Level

Boat Hull Types Require Different Mounting Positions

Level

1/4″ for fiberglass 1/8″ for aluminum

2. Preparing the Mounting Location
In this procedure, you will determine the mounting location and drill two mounting holes, using the transducer mounting bracket as a guide.
1. Make sure that the boat is level on the trailer, both from port to starboard and from bow to stern, by placing your level on the deck of the boat, first in one direction, then in the other.
2. Hold the mounting bracket against the transom of the boat in the location you have selected. Align the bracket horizontally, using the level; make sure that the lower corner of the bracket does not

NOTE: If you have a flat-bottomed aluminum boat, some additional adjustment may be needed to accommodate the rivets on the bottom of the boat (i.e. the gap may need to be a little smaller than 1/8″). This will help you to avoid excessive turbulence at high speeds.
NOTE: If your propeller moves clockwise (in forward, as you’re facing the stern of the boat from behind), mount the transducer on the starboard side, and align the bottom right corner of the mounting bracket with the bottom of the boat. If your propeller moves counter-clockwise (in forward, as you’re facing the stern of the boat from behind), mount the transducer on the port side, and align the bottom left corner of the mounting bracket with the bottom of the boat.

15

Transom Mount – DualBeam PLUSTM

Using the Mounting Bracket to Mark the Initial Drill Holes Fourth Hole

3. Assembling the Transducer and Initial Mounting
In this procedure, you will assemble the transducer using the hardware provided, then mount it and make adjustments to its position without locking it in place.
NOTE: You will initially assemble the transducer and the pivot arm by matching the two ratchets to a numbered position on the transducer knuckle. Further adjustments may be necessary.

Mark Initial Drill Holes

Third Hole

3. Continue to hold the bracket on the transom of the boat, and use a pencil or marker to mark where to drill the two mounting holes. Mark the drill holes near the top of each slot, making sure that your mark is centered in the slot.

NOTE: The third hole should not be drilled until the angle and height of the transducer is finalized, which you will not do until a later procedure.

4. Make sure that the drill bit is perpendicular to the actual surface of the transom, NOT parallel to the ground, before you drill. Using a 5/32″ bit, drill the two holes only to a depth of approximately 1″.
NOTE: On fiberglass hulls, it is best to use progressively larger drill bits to reduce the chance of chipping or flaking the outer coating.

1a. If you already know your transom angle, refer to the chart below for the initial position to use to set the ratchets. If your transom is angled at 14 degrees (a common transom angle for many boats) use position 1 for the ratchets. In either case, go to step 2.

or…

Bead Alignment Number

1

4

2

5

3

1

4

2

5

3

1

Transom Angle (°) Measured Distance (x)

-2 -1 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

0.0 cm 0″

1.1cm 1/2″

2.5 cm 1″

4.3 cm 1 5/8″

5.9 cm 2 3/8″

7.6 cm 3″

9.3cm 3 5/8″

11.1cm 12.9cm 14.9cm 16.9cm

4 3/8″

5″

5 7/8″ 6 5/8″

1b. If you do not know your transom angle, measure it using a plumb line (weighted nylon string or monofilament line) exactly 12 inches long. Hold the top of the plumb line against the top of the transom with your finger, and wait until the line hangs straight down. Using a ruler, measure the distance from the bottom of the plumb line to the back of the transom, then use the chart.

Transom Mount – DualBeam PLUSTM

16

Measuring the Transom Angle

NOTE: It is important to take your measurement in the figure showing Measuring the Transom Angle, from exactly 12 inches down from the top of the transom.

Plumb line
Transom Angle in degrees (°)
Measured Distance (X)

2. Place the two ratchets, one on either

side of the transducer knuckle, so that

the beads on each ratchet line up with

the desired position number on the

knuckle. If you are setting the ratchets

at position 1, the beads on each ratchet

will line up with the rib on the

transducer knuckle to form one

Weight

continuous line on the assembly.

NOTE: The ratchets are keyed; make sure that the square teeth on each ratchet face the square teeth on the transducer knuckle, and the triangular teeth face outward.

Hold the ratchets on the transducer knuckle with one hand and fit the pivot arm over them until it snaps into place with the other hand. Refer to the illustration.

Transducer Knuckle Positions Knuckle

Ratchets Placed in Position 1 Beads Ratchet

Rib at position 1

Ratchets Placed in Position 2 Bead

Fitting the Pivot Arm Over the Ratchet

Rib Ratchet

17

Transom Mount – DualBeam PLUSTM

Inserting the Pivot Bolt

Inserting the Pivot Arm Assembly into the Mounting Bracket

3. Put the pivot bolt through the assembly to hold it in position and loosely install the nut, but do NOT tighten the nut at this time. Insert the pivot arm assembly into the mounting bracket. Do NOT snap the assembly closed, as you will need to access the mounting bracket in the next step.
NOTE: If the pivot assembly is snapped closed over the mounting bracket, use a flat head screwdriver or similar tool to gently pry the assembly away from the mounting bracket.

4. Align the mounting bracket transducer assembly with the drilled holes in the transom. With a 5/16″ socket driver, mount the assembly to the transom using the two #10 – 1″ long screws provided.

Mounting the Assembly to the Transom

NOTE: Make sure that the mounting screws are snug, but do not fully tighten the mounting screws at this time to allow the transducer assembly to slide for adjustment purposes.

5. Snap the pivot arm down into place.

6. Adjust the initial angle of the transducer from back to front by rotating the transducer until the side seam on the transducer is almost parallel with the bottom of the boat, one click at a time in either direction.

Transom Mount – DualBeam PLUSTM

18

Adjusting the Initial Transducer Angle

Leading edge

One click too high
Correctly aligned (transducer side seam aligned with boat bottom)
Trailing edge
One click too low

7. Adjust the transducer assembly vertically, until the seam on the leading edge of the transducer (the edge closest to the transom of the boat) is level and just slightly below the hull.

Adjusting the Transducer Mounting Position

Leveling the Mounting Assembly Horizontally
Level

NOTE: The transducer has a natural downward slant of 4-5 degrees from leading edge (closest to the boat transom) to trailing edge (farthest away from the boat). Looking at the back of the transducer, the seam should be slightly below the bottom of the hull.
8. Continue to adjust until the bracket is also level from port to starboard (horizontally level as you look at the transducer from behind the boat).
9. Mark the correct position on the transom by tracing the silhouette of the transducer mounting bracket with a pencil or marker.
10. Tighten the pivot bolt, using the pivot screw and nut to lock the assembly. Hand tighten only!
11. Snap open the assembly and hand-tighten the two mounting screws, then snap the assembly closed.
NOTE: You will drill the third mounting hole and finalize the installation after you route the cable and test and finish the installation in the following procedures.

Level

Seam aligned with boat hull

19

Transom Mount – DualBeam PLUSTM

4. Routing the Cable
The transducer cable has a low profile connector, which must be routed to the point where the control head is mounted. There are several ways to route the transducer cable to the area where the control head is installed. The most common procedure routes the cable through the transom into the boat.
NOTE: Your boat may have a pre-existing wiring channel or conduit that you can use for the transducer cable.
1. Unplug the other end of the transducer cable from the control head. Make sure that the cable is long enough to accommodate the planned route by running the cable over the transom.
CAUTION! Do not cut or shorten the transducer cable, and try not to damage the cable insulation. Route the cable as far as possible from any VHF radio antenna cables or tachometer cables to reduce the possibility of interference. If the cable is too short, extension cables are available to extend the transducer cable up to a total of 50′. For assistance, contact the Customer Resource Center at humminbird.com or call 1-800-633-1468 for more information.
NOTE: The transducer can pivot up to 90 degrees in the bracket. Allow enough slack in the cable for this movement. It is best to route the cable to the side of the transducer so the transducer will not damage the cable during movement.
2a. If you are routing the cable over the transom of the boat, secure the cable by attaching the cable clamp to the transom, drilling 9/64″ diameter holes for #8 x 5/8″ wood screws, then skip directly to procedure 5, Connecting the Cable.
or…

Routing the Cable

2b. If you will be routing the cable through a hole in the transom, drill a 5/8″ diameter hole above the waterline. Route the cable through this hole, then fill the hole with marine-grade silicone sealant and proceed to the next step immediately.

3. Place the escutcheon plate over the cable hole and use it as a guide to mark the two escutcheon plate mounting holes. Remove the plate, drill two 9/64″ diameter x 5/8″ deep holes, and then fill both holes with marine-grade silicone sealant. Place the escutcheon plate over the cable hole and attach with two #8 x 5/8″ wood screws.

4. Route and secure the cable by attaching the cable clamp to the transom; drill one 9/64″ diameter x 5/8″ deep hole, then fill the hole with marine- grade silicone sealant, then attach the cable clamp using a #8 x 5/8″ screw.

5. Plug the other end of the transducer cable back into the control head connection holder.

Transom Mount – DualBeam PLUSTM

20

Storing Excess Cable

NOTE: If there is excess cable that needs to be gathered at one location (as shown in the illustration), dress the cable routed from both directions so that a single loop is left extending from the storage location. Doubling the cable up from this point, form the cable into a coil. Storing excess cable using this method can reduce electronic interference.

5. Connecting the Cable
Insert the transducer cable into the appropriate terminal slot. The cable connectors are labeled, and there are corresponding labels on the cable holder on the rear of the control head. The slots are keyed to prevent reversed installation, so be careful not to force the connector into the holder. Refer to your manual and/or control head installation guide for the correct procedure for installing the cable connectors to the control head.
1. Plug the other end of the transducer cable back into the control head connection holder.
Your control head is now ready for operation.

6. Test and Finish the Installation
Once you have installed both the control head and the transom transducer, and have routed all the cables, you must perform a final test before locking the transducer in place. Testing should be performed with the boat in the water, although you can initially confirm basic operation with the boat out of the water.
21

1. Press POWER once to turn the control head on. If the unit does not power up, make sure that the connector holder is fully seated in the receptacle and that power is available.
2. If all connections are correct and power is available, the Humminbird® control head will enter Normal operation.
3. If the bottom is visible on-screen with a digital depth readout, the unit is working properly. Make sure that the boat is in water greater than 2′ but less than the depth capability of the unit, and that the transducer is fully submerged, since the sonar signal cannot pass through air.
NOTE: The transducer must be submerged in water for reliable transducer detection.
4. If the unit is working properly, gradually increase the boat speed to test high-speed performance. If the unit functions well at low speeds, but begins to skip or miss the bottom at higher speeds, the transducer requires adjustment.
5. If you have the correct angle set on the transducer, yet lose a bottom reading at high speed, adjust the height and the running angle in small increments to give you the ideal transducer position for your boat. First, adjust the height in small increment.
Transom Mount – DualBeam PLUSTM

NOTE: The deeper the transducer is in the water, the more likely that a rooster tail of spray will be generated at high speeds, so make sure that the transducer is as high as it can be and still be submerged in the water.
If you are still not getting good high speed readings, you may need to disassemble the transducer mounting assembly and re-position the ratchets.
If you do change the transducer position, re-trace the position of the mounting bracket before proceeding.
NOTE: It is often necessary to make several incremental transducer adjustments before optimum high speed performance is achieved. Due to the wide variety of boat hulls, however, it is not always possible to obtain high speed depth readings.
6. Once you have reached a consistently good sonar signal at the desired speeds, you are ready to lock down the transducer settings. Force the pivot to the Up position to gain access to the mounting screws, then re-align the mounting bracket against the transom of the boat to match the traced silhouette. Check the bracket position with the level again to make sure it is still level, then mark the third mounting hole using a pencil or marker. Unscrew and remove the mounting screws and the transducer assembly and set aside.
7. Drill the third mounting hole, using a 5/32″ drill bit. Use a marinegrade silicone sealant to fill all three drilled mounting holes, especially if the holes penetrated the transom wall.

NOTE: On fiberglass hulls, it is best to use progressively larger drill bits to reduce the chance of chipping or flaking the outer coating.

Fully Tighten All Three Mounting Screws

8. Re-position the transducer assembly against the transom of the boat, then hand-install all three screws. Make sure that the transducer location and the pivot angle have not changed, then fully tighten all three mounting screws. Snap the pivot back down. If you have performed the preceding procedures correctly, the transducer should be level and at the right height for optimal operation.

Transom Mount – DualBeam PLUSTM

22

Locking Down the Transducer (Optional)
NOTE: You have the option to lock down the Two Piece Kick Up bracket if you do not want the transducer to kick up. Please be aware, however, that the transducer can be damaged if it is locked down and it strikes debris in the water.

Marking the Fourth Drill Hole for Optional Lock Down
Fourth Hole

Mark Initial Drill Holes

Third Hole

1. To lock down the transducer, trace the position of the mounting bracket. Force the pivot to the Up position to gain access to the mounting screws, then re-align the mounting bracket against the transom of the boat to match the traced silhouette. Check the bracket position with the level again to make sure it is still level, then mark the fourth mounting hole using a pencil or marker. Unscrew and remove the mounting screws and the transducer assembly and set aside.

2. Drill the fourth mounting hole, using a 9/64″ drill bit. Use a marine grade silicone sealant to fill all four drilled mounting holes, especially if the holes penetrate the transom wall.

Fully Tighten All Three Mounting Screws

3. Re-position the transducer assembly against the transom of the boat, then hand install the first three screws (two on the outside edges and one in the 3rd mounting hole). Make sure that the transducer location and the pivot angle have not changed, then fully tighten all three mounting screws. Hand tighten only!

4. Snap the pivot back down. Install #8 x 1″ wood screw into the 4th hole to lock down the pivot arm. Handtighten only!

23

Transom Mount – DualBeam PLUSTM

858c & 958c Inside the Hull Transducer Installation
DualBeam PLUSTM Transducer, XNT 9 20 T (858c and 958c only)
NOTE: Do NOT install the Side Imaging® transducer inside the hull, as the side looking beams cannot penetrate the hull. Only the DualBeam PLUSTM transducer can be mounted inside the hull.
If you choose to mount your transducer inside the hull of your boat, perform the procedures in this section. In-hull mounting generally produces good results in single thickness fiberglass-hulled boats. Humminbird® cannot guarantee depth performance when transmitting and receiving through the hull of the boat, since some signal loss occurs. The amount of loss depends on hull construction and thickness, as well as the installation position and process.
This installation requires slow-cure two-part epoxy. Do not use silicone or any other soft adhesive to install the transducer, as this material reduces the sensitivity of the unit. Do not use five-minute epoxy, as it has a tendency to cure before all the air bubbles can be purged, thus reducing signal strength.
NOTE: In-hull mounting requires an installed and operational control head.

NOTE: Your transducer may not look exactly like the transducer shown in the illustrations, but it will mount in exactly the same way.
There are several procedures you will have to perform in order to install a transducer inside the hull. They are as follows:
· Locate transducer mounting location · Perform a trial installation · Route the transducer cable · Permanently mount the transducer
1. Locating the transducer mounting location
Decide where to install the transducer on the inside of the hull. Consider the following to find the best location:
· Observe the outside of the boat hull to find the areas that are mostly free from turbulent water. Avoid ribs, strakes and other protrusions, as these create turbulence.
· As a general rule, the faster the boat can travel, the further aft and closer to the centerline of the hull the transducer has to be located in order to remain in contact with the water at high speeds.

NOTE: The integral temperature probe will not work with in-hull mounting, so you may either want to consider purchasing a Temperature/Speed accessory, a Temp. Sensor, or obtaining a different transducer. Humminbird® offers a transducer exchange program to swap the NEW and UNASSEMBLED transducer, accompanied by mounting hardware, for one without an integral temperature probe. Call the Humminbird® Customer Resource Center at 1-800-633-1468 for details, or visit humminbird.com for more information.

Inside the Hull Mount – DualBeam PLUSTM

24

Areas of Possible Turbulence

Stepped Hull

3. Place the transducer body face down at the identified mounting location inside the hull, with the end that has the mounting knuckle pointed towards the bow of the boat.
Preferred Mounting Area

Rivets

Strakes

Step

Rib

Transom

Hull

2. Trial installation
You will not be able to adjust the mounting after an inside the hull transducer is installed. It is best, therefore, to perform a trial installation first that includes running the boat at various speeds, in order to determine the best mounting area before permanently mounting the transducer.
1. Plug the transducer into the control head, then power up the control head. When the control head detects a functioning transducer, it will automatically enter Normal operating mode.
2. View the sonar signal at its best by holding the transducer over the side, immersed in the water, so that it is pointing straight down over a known flat bottom. Use the display to benchmark against the sonar signal that will be detected once the transducer is placed in the hull.

4. Fill the hull with enough water to submerge the transducer body. Use a sand-filled bag or other heavy object to hold the transducer in position. The transducer cannot transmit through air, and the water purges any air from between the transducer and the hull, and fills any voids in the coarse fiberglass surface.
5. View the sonar signal on the display and compare against what you observed in Step 2, making sure that the boat is in the same location as it was during your observations in Step 2. If the results are comparable, move on to Step 6. Otherwise, locate a new position in the hull and repeat Steps 3 through 5.

25

Inside the Hull Mount – DualBeam PLUSTM

6. Run the boat at various speeds and water depths while observing the screen on the control head. If depth performance is required, test the transducer in water at the desired depth. If the performance is acceptable, move on to Step 7. If the performance is not acceptable, repeat Steps 3 through 6.
7. Once you have determined the best mounting location using the above steps, mark the position of the transducer.

3. Routing the cable
1. Once the mounting location is determined and you have marked the position of the transducer, route the cable from the transducer to the control head.

5. Coat the face of the transducer and the inside of the hull with epoxy.

4. Permanently mounting the transducer
1. Make sure the position of the transducer is marked.
2. You may have to disconnect the cable to the control head and reconnect it at the end of this procedure.
3. Remove the water from inside the hull and thoroughly dry the mounting surface. If the surface is excessively rough, it may be necessary to sand the area to create a smooth mounting surface.
4. Slowly and thoroughly mix an ample quantity of two-part slow cure epoxy. Avoid trapping air bubbles.

6. Press the transducer into place with a slight twisting motion to purge any trapped air from underneath, keeping the end of the transducer that has the mounting knuckle pointed forward, towards the bow of the boat.
NOTE: Proper operation requires the end of the transducer that has the mounting knuckle to face towards the bow of the boat.
7. Weight the transducer so that it will not move while the epoxy is curing.
NOTE: When the epoxy cures, no water is necessary inside the hull.
8. If you unplugged the transducer cable at the beginning of this procedure, plug it back into the control head.

NOTE: Neither water, spilled gasoline, nor oil will affect the performance of the transducer.

Inside the Hull Mount – DualBeam PLUSTM

26

898c SI & 998c SI Transom Mount Transducer Installation
Side Imaging® Transducer, XHS 9 HDSI 180T (898c SI or 998c SI only)
In addition to the hardware supplied with your transducer, you will need a powered hand drill and various drill bits, various hand tools, including a ruler or straightedge, a marker or pencil, safety glasses and dust mask, and marine-grade silicone sealant.
The Side Imaging® transducer has some special requirements because of its side viewing capabilities:
· The Side Imaging® transducer must NOT have anything obstructing the `view’ of the side looking beams, i.e. nothing can be in the line of sight of these beams (not a hull, motor, or other transducer, etc).
NOTE: You may need to tilt the motor up and out of the way when using the side looking beams.
· In order for the side beams to be displayed accurately, the transducer must be mounted so that it is looking straight down in the water when the boat is in the water.

Transducer Mount Position

Unobstructed View: The jack plate gives the transducer safe distance from the motor and turbulence. The Side Imaging® has a clear view side-to-side.

Obstructed View: The transducer is too close to motor turbulence, and the Side Imaging® view is blocked by the motor. The view cannot extend from side-to- side.

NOTE: Due to the wide variety of hulls, only general instructions are presented in this installation guide. Each boat hull represents a unique set of requirements that should be evaluated prior to installation. It is important to read the instructions completely and understand the mounting guidelines before beginning installation.

NOTE: If the included transducer will not work for your application, you may exchange it, NEW and UNASSEMBLED, with mounting hardware included, for a transducer appropriate for your application – often at very little or no charge depending on the transducer. Call the Humminbird® Customer Resource Center at 1-800-633-1468 for details and pricing, or visit humminbird.com.
NOTE: When drilling holes in fiberglass hulls, it is best to start with a smaller bit and use progressively larger drill bits to reduce the chance of chipping or flaking the outer coating.

27

Transom Mount – Side Imaging®

Overview
If you will be installing a Side Imaging® transom mounted transducer, use the procedures in this section. There are two pieces to the transducer mount assembly: the pivot, and the bracket. Your transducer comes with a two-piece metal and plastic bracket assembly. There are several procedures you will have to perform in order to install a transom-mounted transducer. They are:
· Determine transducer mounting location · Mount the bracket to the boat · Attach the pivot to the transducer · Mount the transducer pivot assembly to the bracket · Adjust the running position of the transducer · Route the transducer cable · Perform a final test of the transom transducer installation

Areas of Possible Turbulence

Stepped Hull

1. Locating the transducer mounting location
NOTE: If transom mounting is not possible because of a stepped hull or cavitation noise, trolling motor installation may be an option. See Trolling Motor Transducer Installation for more information.
1. First, determine the best location on the transom to install the transducer. Consider the following to find the best location:
· It is very important to locate the transducer in an area which is relatively free of turbulent water. As a boat moves through the water, turbulence is generated by the weight of the boat, and the thrust of the propeller(s) – either clockwise or counter-clockwise. This turbulent water is normally confined to areas immediately aft of ribs, strakes or rows of rivets on the bottom of the boat, and in the immediate area of the propeller(s). Clockwise propellers create more turbulence on the port side. On outboard or inboard/outboard boats, it is best to locate the transducer at least 15″ (380 mm) to the side of the propeller(s).

Rivets

Strakes

Step

Transom

Hull

Transom Mount – Side Imaging®

Deadrise Angle

· The best way to locate turbulence-free water is to view the transom

while the boat is moving. This method is recommended if maximum

high-speed operation is a high priority. If this is not possible, select a

Rib

location on the transom where the hull forward of this location is

smooth, flat and free of protrusions or ribs.

28

· The hydrodynamic shape of your transducer allows it to point straight down without deadrise adjustment.
· On boats with stepped hulls, it may be possible to mount the transducer on the step. Do not mount the transducer on the transom behind a step to avoid popping the transducer out of the water at higher speeds; the transducer must remain in the water for the control head to maintain the sonar signal.
· If the transom is behind the propeller(s), it may be impossible to find an area clear from turbulence, and a different mounting technique or transducer type should be considered (see Trolling Motor Transducer Installation).
· The Side Imaging® transducer must NOT have anything obstructing the `view’ of the side looking beams, i.e. nothing can be in the line of sight of these beams (not a hull, motor, or other transducer, etc).
Mounting the transducer bracket to the boat
1. Remove the transducer mounting template from this manual. See Appendix A for the Transducer Mounting Template.

2. Hold the template on the transom of the boat in the location where the transducer will be installed. Align the template vertically, matching the lower edge of the transom with the bottom corner of the template. If your propeller moves clockwise as the boat moves forward, mount the transducer on the starboard side, and use the bottom left corner of the template. If your propeller moves counterclockwise as the boat moves forward, mount the transducer on the port side, and use the bottom right corner of the template.
3. Using a pencil or punch, mark the three mounting holes on the transom. Do not mark or drill any other holes at this time.
4. Using a 5/32″ (4.0 mm) bit, drill the three holes to a depth of approximately 1″ (25 mm). On fiberglass hulls, it is best to use progressively larger drill bits to reduce the chance of chipping or flaking the outer coating. Use a marine-grade silicone sealant to fill the drilled holes.
Attaching the Bracket

15″ (380 mm) from prop(s) 29

Transom Mount – Side Imaging®

5. Align the metal mounting bracket with the mounting holes. The center slot should be above the two outer slots. (This bracket and all other hardware supplied is top quality stainless steel for maximum strength and corrosion protection.) Insert the three #10 – 1″ long screws into the drilled holes, but do not completely tighten.

Attaching the pivot to the transducer
1. Attach the pivot to the transducer body, using the two 1/4″-20 x 5/8″ (16 mm) machine screws, toothed washers, and square nuts. The toothed washers must fit on the inside of the transducer ears, between the pivot and the ears. The square nuts will be prevented from rotating by the pocket in the back of the pivot. An Allen wrench is provided which fits all the 1/4″-20 screws, but do not fully tighten the screws at this time.

3

1

2

4

1 Insert the square nuts 2 Toothed Washer 3 Pivot 4 Machine Screw
Transom Mount – Side Imaging®

Attach the Pivot

Mounting the transducer pivot assembly to the bracket
1. Slide the assembled transducer into the metal bracket from the bottom, aligning the large hole at the top of the bracket with the hole in the pivot.
2. Insert the headed pin through the pivot holes in the bracket and pivot. The headed pin can be inserted from either side of the bracket.
3. Place the nylon washer over the opposite end of the headed pin. Place the stainless washer over the 1/4″-20 x 5/8″ (16 mm) screw threads, then insert into the opposite end of the headed pin and finger tighten only. The screw has a thread locking compound on the threads to prevent loosening, and should not be fully tightened until all adjustments are made.
NOTE: The running position of the transducer is now completely adjustable. Subsequent adjustment may be necessary to tweak the installation after high speed testing.

1

5

3 4

2
1 Screw 2 Headed Pin 3 Allen Wrench 4 Nylon Washer 5 Stainless Washer

30

Adjusting the running position of the transducer
The transducer mounting bracket allows height and tilt adjustment, while the pivot bolt allows angular adjustment. These adjustments will help reduce cavitation. Initially, adjust the transducer as described in the following paragraphs. Further adjustment may be necessary to refine the installation after high-speed testing.

Normal Cavitation

Cavitation that will cause erratic sonar readings

1. First, adjust the pivot angle of the transducer body, so it is parallel with the length of the hull of the boat.
2. Fully tighten the two pivot screws, using the supplied Allen wrench. Access to the pivot screws is provided by the lower holes in the side of the mounting bracket. It may be necessary to re-tighten the pivot bolt after initial use as the plastic may still be conforming to the pressure from the lock washers.

3. Adjust the height of the assembly so the face of the transducer is 1/8″ (3 mm) to 1/4″ (6 mm) beneath the bottom of the transom, and fully tighten the three mounting screws.

Tighten the Mounting Screws

4. In order to gain access to the mounting screws, the transducer assembly must be pivoted up in the bracket as shown. Be careful not to alter the running angle as some force is necessary to pivot the assembly.

5. If access to the top mounting hole is not possible due to the selected height of the transducer, fully tighten the two lower screws, then simply remove the headed pivot pin and the transducer assembly, and tighten the top screw, then reassemble.

6. Confirm that the pivot angle has not changed and that all mounting screws are fully tightened.

31

Transom Mount – Side Imaging®

Routing the cable
The transducer cable has a low profile connector that must be routed to the point where the control head is mounted. There are several ways to route the transducer cable to the area where the control head will be installed. The most common procedure routes the cable through the transom into the boat.
NOTE: Your boat may have a pre-existing wiring channel or conduit that you can use for the transducer cable.
1. Unplug the other end of the transducer cable from the control head. Make sure that the cable is long enough to accommodate the planned route by running the cable over the transom.
CAUTION! Do not cut or shorten the transducer cable, and try not to damage the cable insulation. Route the cable as far as possible from any VHF radio antenna cables or tachometer cables to reduce the possibility of interference. If the cable is too short, extension cables are available to extend the transducer cable up to a total of 50′ (15 m). For assistance, contact the Customer Resource Center at humminbird.com or call 1-800-633-1468 for more information.
NOTE: Since the transducer may need to pivot up to 90° in the bracket if it strikes an object, make sure there is sufficient cable slack to accommodate this motion. It is best to route the cable to the side of the transducer so the cable will not be damaged by the rotation of the transducer.
2. If you will be routing the cable through a hole in the transom, drill a 5/8″ diameter (16 mm) hole above the waterline. Route the cable through this hole, then fill the hole with marine-grade silicone sealant and proceed to the next step immediately.

Routing the Cable 5/8″ Hole
Escutcheon Plate
Cable Clamp

3. Place the escutcheon plate over the cable hole and use it as a guide to mark the two escutcheon plate mounting holes. Remove the plate, drill two 9/64″ (3.5 mm) holes, then fill both holes with marinegrade silicone sealant. Place the escutcheon plate over the cable hole and attach with two #8 x 5/8″ (16 mm) wood screws.
4. Route and secure the cable by attaching the cable clamp to the transom; drill one 9/64″ dia. (3.5 mm) x 5/8″ deep (16 mm) hole, then fill hole with marine-grade silicone sealant, then attach the cable clamp using a #8 x 5/8″ (16 mm) screw.
5. Plug the other end of the transducer cable back into the control head connection holder.

Testing the installation
After transom transducer installation, please perform the final testing and then finalize the installation (see Test and Finish the Transducer Installation).

Transom Mount – Side Imaging®

32

Trolling Motor Transducer Installation
Several styles of the transducer are compatible with trolling motor mounting. If you have a trolling motor bracket, refer to the separate installation instructions that are included with the bracket.
NOTE: After trolling motor transducer installation, please perform the final testing and then finalize the installation (see Test and Finish the Transducer Installation).
Trolling Motor Transducer Options
If you don’t have a trolling motor transducer, there are several options:
· You may purchase a Trolling Motor Adapter kit that will allow you to mount the transducer on the trolling motor.
· You may also exchange your NEW and UNASSEMBLED transducer (with mounting hardware included) for a trolling motor transducer.
There are also several transducer switches available that support the following configurations:
· Two control heads with one transducer · Two transducers with one control head.
NOTE: Call the Humminbird® Customer Resource Center 1-800-633-1468 for details and pricing, or visit humminbird.com for more information.

Test and Finish the Transducer Installation
When you have installed both the control head, the transducer, and accessories, and have routed all the cables, you must perform a final test before locking the transducer in place. Testing should be performed with the boat in the water, although you can initially confirm basic operation with the boat out of the water.
1. Press the POWER/LIGHT key once to turn the control head on. There will be an audible chirp when the key is pressed correctly. If the unit does not power-up, make sure that the connector holder is fully seated and that power is available.
2. If all connections are correct and power is available, the control head will enter Normal operation. If no transducer is detected (or one is not connected), the unit will go into Simulator mode and will indicate this by displaying the word Simulator on the control head display.
NOTE: The transducer must be submerged in water for reliable transducer detection.
3. If the bottom is visible on-screen with a digital depth readout, the unit is working properly. Make sure that the boat is in water greater than 2 ft (.6 m) but less than the depth capability of the unit, and that the transducer is fully submerged, since the sonar signal cannot pass through air.

33

Test & Finish Transducer Installation

4. If the unit is working properly, gradually increase the boat speed to test high-speed performance. If the unit functions well at low speeds but begins to skip or miss the bottom at higher speeds, the transducer requires adjustment. Angling the rear of the transducer downward and/or lowering the transducer farther into the water will help achieve depth readings at high speeds. If the left side of the fish arch is longer than the right side, then the back of the transducer is angled too far downward. If the right side of the fish arch is longer than the left side, then the back of the transducer is angled too far upwards.
NOTE: It may not always be possible to get symmetrical fish arches and high speed depth readings at the same time. Due to the wide variety of boat hulls, however, it is not always possible to obtain high speed depth readings.
NOTE: It is often necessary to make several incremental transducer adjustments before optimum high speed performance is achieved.
Once you have reached a consistently good sonar signal at the desired speeds, you are ready to lock down the transducer settings.
5. Mark the transducer bracket location on the transom with a pencil, then pop up the bracket to reveal the mounting screws. Tighten the stainless steel mounting bracket screws to secure in place. Hand-tighten only!

GPS Receiver Installation Overview
To optimize performance of the GPS receiver, mount it in an area that has full exposure to the sky. The effective area of reception is 10° above the horizon. Different circumstances determine the mounting method appropriate for your GPS receiver.

If you have…
An existing antenna stem with standard 1″ ­ 14 thread stem
Access for cable routing under the mounting location
No access under the mounting location

Then use:
Stem Mount with Existing 1″ 14 Thread Stem
Access Under Mounting Location
No Access Under Mounting Location

The pinouts of the pigtail cable are as follows:
· Red Wire, +12V (output voltage only) · Black Wire, Ground · White Wire, NMEA Out.
CAUTION! Please use caution before connecting the red +12V wire to any other NMEA device. This is an output voltage provided by the Fishfinder unit and GPS receiver and should only be connected to those NMEA devices that need a 12 volt input.

GPS Receiver Installation Overview

34

Stem Mounting with an Existing 1″ – 14 Thread Stem
Follow these steps to stem mount the GPS receiver:
NOTE: If you have an existing stem for mounting the GPS receiver, proceed directly to step 2 of the following procedure.
1. Determine the best location to mount your GPS receiver. Preplan and test the cable routing to your control head before any drilling or cutting of your boat surfaces. If you have purchased hardware to stem mount your GPS receiver, follow the instructions included with that hardware to mount the stem (antenna pole).

3. Use electrical tape to secure the NMEA pigtail to the cable as shown.
NOTE: Leave the NMEA pigtail secured to the cable unless needed. This will make removing the receiver easier.
4. Route the GPS receiver cable through the stem and continue with the planned route you chose in step 1.
5. Attach the GPS receiver to its base using the included #6 – 7/8″ screws.

NOTE: AS-EC10 10′ extension cables are available from Humminbird® if your
planned routing exceeds 20′, (6 m). Maximum cable length, including extensions,
should not exceed 50′ (16 m). 3
NOTE: Remember to caulk or seal screw holes and drilled holes as needed to
protect your boat from water damage.

1 2
1 Receiver 2 Receiver Base 3 Stem Pipe

2. Screw on the receiver base to the stem first, making sure that the stem pipe does not protrude from the receiver base. This adds protection to the cable when pulling it through the pipe stem. In addition to this, de-burr the pipe edges to reduce cable abrasion.
3

1 2
1 NMEA Pigtail Taped 2 NMEA Pigtail Cable Out

4
3 Mounting Screws 4 Cable Route

35

GPS- Stem Mount

Access Under Mounting Location
Follow these steps to deck mount the GPS receiver when routing the cable down through the mounting location:
1. Determine the best location, then test route the 20′ (6 m) cable from the mounting location to the control head.
NOTE: Installation details may vary with unit configuration.
2. Mark the mounting location and drill a 3/4″ (19 mm) hole for the cable and cable plug. Route the cable.
3. Cover the cable hole with the receiver. Make sure the receiver is flush on the surface and mark the two mounting holes with a pencil or punch.
4. Move the receiver to the side and drill two pilot holes using a 9/64″ (3.5 mm) bit.
NOTE: Remember to caulk or seal screw holes and drilled holes as needed to protect your boat from water damage.
5. Align the GPS receiver screw holes over the pilot screw holes and attach with the #8 – 1 1/4″ Phillips head screws. Hand tighten only!
NOTE: If the mounting surface is thin and made of a lighter material, a backing material may be needed below the mounting surface.

Access Under Mounting Location

No Access Under Mounting Location

No Access Under Mounting Location
Follow these steps to deck mount the GPS receiver in a situation where you must route the cable to the side because there is no space for a cable underneath the mounting location.
1. Determine the best location, then test route the cable from the mounting location to the control head.
NOTE: AS-EC10 10′ extension cables are available from Humminbird® if your planned routing exceeds 20′, (6 m). Maximum cable length, including extensions, should not exceed 50′ (16 m).
2. Confirm the cable length is good and route the cable from the receiver to the control head. If holes are required to route the cable, they must be 3/4″ (19 mm) to allow for the cable connector. Secure the NMEA pigtail with electrical tape.
NOTE: Remember to caulk or seal screw holes and drilled holes as needed to protect your boat from water damage.

GPS- Access Under/No Access Under Mount

36

3. The GPS receiver has two wire routing notches. Use the cable notch closest to the intended cable route.
4. With the cable routed, position the GPS receiver in the planned mounting location and mark the mounting holes with a pencil or punch.
5. Move the GPS receiver to the side and drill the two 9/64″ (3.5 mm) pilot holes.
6. Align the GPS receiver’s screw holes over the pilot screw holes and attach with the #8 – 1 1/4″ Phillips head screws. Hand tighten only!
Finish Routing the Cable and Check GPS Receiver Operation
After installing a GPS receiver, you should perform the following procedure to finish routing the GPS cable to the control head and to check to make sure that the control head is working correctly.
1. Secure the cable along its path to the control head as needed with cable ties.
2. Plug the GPS receiver cable into the Communications port on the control head. See Testing the System Installation to use the System Status start-up option and/or the GPS Diagnostic View to confirm a good installation.

123 4

1 Power

2 Temp/Speed

5

3 Communications/GPS

4 Transducer

5 Cable Collector Insert

37

GPS- Route Cable & Test Operation

Testing the System Installation
After you have completed the installation of the control head, transducer, and any other accessories such as the GPS receiver, and have made all the cabling connections required, you must test the installation before using the system. Thorough testing should be performed with the boat in the water; however, you can confirm basic operation initially with the boat out of the water as well.
To test the installation:
1. Press the POWER/LIGHT key on the control head once to turn on the control head. (There will be an audible chirp to let you know that you pressed the key, and the initial Title screen will appear.) If the unit does not power up, make sure that power is available. While the Title screen is shown on the display, press the MENU key to display the Start-Up Options menu. Use the UP or DOWN 4-WAY Cursor keys to position the cursor, then the RIGHT Cursor key to select System Status from the Start-Up Options menu (see the Start-Up Options Menu section for more information about these menu choices). The System Status Self Test screen will appear.
NOTE: If you wait too long, the system will default to whichever menu mode happens to be highlighted, and you will have to start again.
2. Self Test displays results from the internal diagnostic self test, including unit serial number, Printed Circuit Board (PCB) serial number, software revision, total hours of operation and the input voltage. See System Status for more information about the Self Test.

3. From the System Status screen, view accessory connections by pressing the VIEW key. See System Status for more information about the Accessory Test.
NOTE: The speed will be detected only if the paddlewheel has moved since the Fishing System has been powered up.
4. From the System Status screen, see a GPS Diagnostic View by pressing the View key. GPS Diagnostic View shows a sky chart and numerical data from the GPS receiver. The sky chart shows the location of each visible GPS satellite with its satellite number and a signal strength bar. A dark grey bar indicates that the satellite is being used to determine your current position. A light gray bar indicates that the satellite is being monitored, but is not yet being used. See System Status for more information about the GPS Diagnostic View.

Test System Installation

38

Power On the Control Head
Press the POWER/LIGHT key to power on your Humminbird® control head. When the Title screen is displayed, press the MENU key to access the Start-Up Options Menu. Select Normal (if there is a transducer attached to the control head) or Simulator (if there isn’t a transducer attached to the control head).
998c SI Combo Title Screen NOTE: If a functioning transducer is connected, Normal will be selected automatically at power up, and your Fishing System can be used on the water. Select Simulator to learn how to use your control head and save settings in advance for later use. See Start-Up Options Menu for more information.

What’s on the Control Head
Your Fishing System user interface is easy to use. A combination of keys, different views, and situation-specific, customizable menus allows you to control what you see on the color display. Refer to the following illustration, and see Key Functions, Views, and The Menu System for more information.

3 9

7

5

1

6

8

12

10

11

4 2

1 Screen 2 MMC/SD Card Slot 3 ZOOM (+/-) Keys 4 POWER/LIGHT Key 5 INFO Key* 6 MARK Key

4-WAY Cursor Control Key 7 MENU Key 8 VIEW Key 9 EXIT Key 10
VIEW PRESET Keys 11 GOTO Key 12

*Your control head will have one of the INFO keys shown here

.

Both keys function in the same way.

39

What’s on the Control Head

Key Functions
Your Fishing System has a set of easy to use keys that give you flexibility and control over your fishing experience.
POWER/LIGHT Key
The POWER/LIGHT key is used to power the Fishing System on and off. You can also use the POWER/LIGHT key to adjust the backlight and contrast of the display.
Power On the control head: Press the POWER/LIGHT key to power on the unit. When the Title screen is displayed, press the MENU key to access the Start-Up Options Menu.
Power Off the control head: Press and hold the POWER/LIGHT key for 3 seconds. A message will appear to indicate how many seconds there are until shutdown occurs. To ensure that shutdown occurs properly and any menu settings will be saved, your Fishfinder should always be turned off using the POWER/LIGHT key.
Adjust the Backlight or the Display Background Color: Press the POWER/LIGHT key to access the Light and Background submenu. Use the 4-WAY Cursor Control key to select Light or Background, and then use the LEFT or RIGHT Cursor key to change the settings. Press EXIT to exit the Light and Background submenu.

NOTE: Your control head will start up with the backlight on and will automatically turn it off to conserve power.
VIEW Key
The VIEW key is used to cycle through all available views. Press the VIEW key to advance to the next view. Press the VIEW key repeatedly to cycle through all available views. Views can be hidden to optimize the system to your fishing requirements (see Views or View Menu Tab).
MENU Key
The MENU key is used to access the menu system. See The Menu System for more information.
Start-Up Options Menu: Press the MENU key during the power up sequence to view the Start-Up Options menu.
X-PressTM Menu: Press the MENU key once in any view to access the XPressTM Menu, which provides frequently-used menu settings that correspond with the current view or navigation mode.
Main Menu: Press the MENU key twice in any view to access the Main Menu, which is organized under tabbed headings to help you find a specific menu item quickly.

Key Functions

40

4-WAY Cursor Control Key
(RIGHT, LEFT, UP, or DOWN Cursor Keys)
The 4-WAY Cursor Control key has multiple functions, which depend on the view, menu, or situation.
· Menu Selection: Press the DOWN or UP Cursor keys to highlight a menu option, then press the RIGHT or LEFT Cursor keys to change a menu setting. The changes will be activated and saved immediately.
· Freeze Frame: In Sonar View, press any arrow on the 4-WAY Cursor Control key to freeze the display and move the active cursor to a location on the screen. A cursor dialog box will display to show the depth of the location you choose.
· Active Cursor: Press any arrow on the 4-WAY Cursor Control key, and the active cursor will appear on the screen.
· Chart Views: The 4-WAY Cursor Control key also pans the charts and highlights decluttered waypoint icons.
NOTE: In Freeze Frame or Active Cursor mode, you can also make the cursor move diagonally by pressing in between two of the arrows on the 4-WAY Cursor Control key.
· Bird’s Eye View: The 4-WAY Cursor Control key controls the motion of the eye point.
· Snapshot and Recording View: Press the UP or DOWN Cursor keys to highlight a recording icon, and then press the RIGHT Cursor key to start recording playback. Press the RIGHT or LEFT Cursor keys to control the speed of playback.

VIEW PRESET Keys
The VIEW PRESET keys are used to save your three favorite views for quick retrieval. Instead of using the VIEW key to cycle through all the views to find the one you want, you can program the VIEW PRESET keys to display a specific view immediately. See Views for more information.
EXIT Key
The EXIT key has multiple functions, which depend on the situation:
· If an alarm is sounding, press the EXIT key to cancel the alarm. · If a menu tab is selected, press the EXIT key to exit the menu mode
and return to the view. · If a menu is active, press the EXIT key to return to the previous level
in the menu system. · From any view, press the EXIT key to cycle through the available
views in reverse order. · If Freeze Frame is active, press the EXIT key to return to a scrolling
display. · If the Cursor is active, press the EXIT key to remove the cursor from
the display.

41

Key Functions

INFO Key
Press the INFO key while in Bird’s Eye, Chart, or Combo View to display information about objects that are near an active cursor. If the cursor is not active, the Chart Info submenu will be displayed. See Views: Viewing Cartography for more information.
NOTE: Your control head will have one of the INFO keys shown here. Both keys function in the same way.

MARK Key
Press the MARK key while in any view to mark the position of a waypoint. The MARK key function is available if the GPS receiver connected.

· Active Cursor: The waypoint will be marked at the cursor location.
· Without Active Cursor: The waypoint will be marked at the boat location.
· If Screen Snapshot is active, a waypoint will be created, and a screen snapshot will also be saved to the optional-purchase MMC/SD card (see Views: Snapshot and Recording View). Navigation is not affected by the Screen Snapshot feature.
NOTE: If Screen Snapshot is enabled but there is not a GPS receiver connected, pressing the MARK key will capture the screen image and display an error saying that a GPS position fix is required to create a waypoint.
NOTE: You must have an optional-purchase MMC/SD card installed for the screen snapshot feature to work.

Key Functions

42

GOTO Key
The GOTO key has multiple functions, which depend on the situation.
· Active Cursor: Press the GOTO key while in any view to create a waypoint and start navigation towards that waypoint.
· Without Active Cursor: Press the GOTO key to display the saved waypoints list, and then highlight a waypoint. Press the RIGHT Cursor key to begin navigation.
· Man Overboard: Press and hold the GOTO key for more than 1.5 seconds to activate the Man Overboard (MOB) function. Once MOB is activated, any current navigation will be cancelled and the current route will be discarded without notification (see Man Overboard (MOB) Navigation).
ZOOM (+/-) Keys
The Zoom keys function in different ways which depend on the view displayed.
· Navigation Views or the Sonar Zoom View: Press the +/- ZOOM key to change the scale of the view to appear closer or farther away.
· Side Imaging® View: Press the – or + ZOOM keys to change the scale of the view. The cursor must be active for zoom to work in the Side Imaging® View.

Inserting an MMC/SD into the Card Slot

Multi-Media Card (MMC)/SD Slots
The two multi-media card (MMC)/SD slots on your control head can be used with MMC/SD cards (optional-purchase required) to add detailed charts to your Fishing System, update your Fishing System software, or export navigation data from your Fishing System.

NOTE: The MMC/SD Cards require a separate purchase. For more information, visit our web site at humminbird.com or contact our Customer Resource Center at 1-800-633-1468.

To insert an MMC/SD card:
1. Remove the MMC/SD slot cover.
2. Position the MMC/SD card so that the label faces the left side of the unit, and insert the card into the slot. Press down on the card until it clicks into place.
3. Close the slot cover and turn the knob just 1/4 of a turn to close. Do NOT overtighten, as this will not improve water resistance and may damage the cover.
4. To Remove: Press the MMC/SD card into the slot and then release. The card will eject, and you can then pull the card from the slot.

Add Maps to Your Fishing System
Your Fishing System includes a built-in Contour XDTM or UniMapTM with a more detailed map of North America (Domestic models) or a detailed map of Europe and Southeast Asia, including Australia and New Zealand (International models).
You can also purchase MMC/SD cards with additional chart information for a particular location.
NOTE: The MMC/SD Cards require a separate purchase. Your Fishing system supports LakeMaster® and Navionics® Cartography on MMC or SD card media.
· Auto Select: When you install the MMC/SD cards in your control head, your Fishing System will retrieve the chart and display it automatically.
· Chart Select: You can also choose which chart to display with the Chart Select menu option in the Chart Menu Tab. Choose Right (card slot) or Left (card slot) to select the MMC/SD card you’d like to use. (see Chart Menu Tab: Chart Select).
· Menu Options: The Chart Menu Tab will change to display menu options that correspond with the active chart (see Chart Menu Tab).

43

Multi-Media Card Slots

Update Software
Software updates can be added to your Fishing System. Go to the Humminbird® web site for information and computer requirements at humminbird.com or call 1-800-633-1468.
In addition to your Fishing System and personal computer with Internet access, you will need one of the following optional-purchase accessories:

· Power on your control head. The Fishing System will recognize the new software and run through a series of prompts to confirm software installation.
OR…
3b. PC Connect Cable: Follow the instructions included with the PC Connect Cable to connect your Fishing System to your computer.

· MMC Card Reader (AS CR) OR… · PC Connect Cable (AS PC2)
NOTE: The MMC/SD Card Reader and PC Connect cable require a separate purchase. For more information, visit our web site at humminbird.com or contact our Customer Resource Center at 1-800-633-1468.

Export Navigation Data
You can export all saved Tracks, Waypoints, and Routes from your Fishing System to an optional-purchase MMC/SD card (see Navigation Menu Tab).
To Export All Navigation Data: 1. Make sure that an optional-purchase MMC/SD card is installed in the slot.

Updating Software requires the following top-level steps:
1. Log on to www.humminbird.com. · Register your Fishing System.
· Download HumminbirdPCTM to your computer. 2. Once you have registered your Fishing System, you can access
software downloads from your online profile.
3a. MMC/SD Card: Follow the instructions provided with the MMC/SD Card Reader to connect the MMC/SD Card Reader to a personal computer and download the software update.
· Install the MMC/SD card with the updated software file into your control head.

2. Press the MENU key twice to access the Main Menu. In the Navigation tab, highlight Export All Nav Data.
3. Press the RIGHT Cursor key to export all navigation data. The Confirm dialog box will appear. To confirm export, press the RIGHT Cursor key once more. To cancel export, press the LEFT Cursor key.
NOTE: If there isn’t an MMC/SD card installed, an error message will be displayed. Insert the MMC/SD card and try again.
NOTE: The MMC/SD cards and MMC/SD Card Reader require separate purchases. The MMC/SD Card Reader accessory can be used in conjunction with your personal computer to view and organize your exported navigation data. To purchase this accessory, visit our web site at humminbird.com or contact our Customer Resource Center at 1-800-633-1468.

Multi-Media Card Slots

44

What’s on the Sonar Display
The Fishing System can display a variety of useful information about the area under and adjacent to your boat, including the following items:

Triplog

1

2

3

4

8 Thermoclines – Layers of water with different

temperatures that appear at different depths

and different times of the year. A thermocline

typically appears as a continuous band of

many colors moving across the display at the

10

same depth.

9 Sonar Color Bar – Color spectrum indicating

low to high sonar intensity returns, where

8

red indicates high intensity and white

9

indicates low intensity.

5

13

6

7 12
1 Depth – Water depth; can be set to alarm when the water becomes too shallow. 2 Timer – Elapsed time with Speed accessory or GPS Receiver. 3 Distance – Distance traveled with Speed accessory or GPS Receiver. 4 Average Speed – Average speed reading with Speed accessory or GPS Receiver.

10 Bait Ball

11 RTSTM (Real Time Sonar) Window

12 Second Sonar Return – When the sonar

signal bounces between the bottom and the

surface of the water and back again. Use

11

the appearance of the second return to determine bottom hardness. Hard bottoms

will show a strong second return, while soft

bottoms will show a very weak one or none

at all.

5 Barometric Pressure – Requires optional-purchase WeatherSense®
6 Temperature – Water surface temperature
7 Speed – If a Speed accessory or GPS Receiver is attached, the Fishing System can display the speed of the boat, and can keep a triplog of nautical or statute miles traveled.

13 Cursor – Available in Freeze Frame and can be positioned in the Sonar View to provide depth of a sonar retun and bottom depth below the cursor. The Latitude and Longitude of the cursor position, the distance to travel to the cursor position, and the bearing to the cursor position are shown with a GPS Receiver attached. Cursor information is displayed at the top of the screen.

45

What’s on the Sonar Display

Triplog

Understanding the Sonar Display
It is important to understand the significance of the display. The display does NOT show a literal 3-dimensional representation of what is under the water. Each vertical band of data received by the control head and plotted on the display represents something that was detected by a sonar return at a particular time. As both the boat and the targets (fish) may be moving, the returns are only showing a particular segment of time when objects were detected, not exactly where those objects are in relation to other objects shown on the display.
The returned sonar echoes are displayed on the screen. As a new echo is received, the historical data scrolls left across the display.

Real Time Sonar (RTSTM) Window
A Real Time Sonar (RTSTM) Window appears on the right side of the display in the Sonar View only. The RTSTM Window always updates at the fastest rate possible for depth conditions and shows only the returns from the bottom, structure and fish that are within the transducer beam. The RTSTM Window plots the depth and intensity of a sonar return. (See Sonar Menu Tab: Real Time Sonar (RTSTM) Window).

The Narrow RTSTM Window indicates the sonar intensity through the use of colors. Red indicates a strong return and blue indicates a weak return. The depth of the sonar return is indicated by the vertical placement of the return on the display depth scale.

The Wide RTSTM Window indicates the sonar intensity through the use of a bar graph. The length of the plotted return provides an indication of whether the return is weak or strong. The depth of the sonar return is indicated by the vertical placement of the return on the display depth scale.

SwitchFireTM
SwitchFireTM controls how the sonar returns are displayed in the Sonar Views. SwitchFireTM settings are available in the Sonar Menu Tab.

To see the maximum sonar information available within the transducer beam so more fish arches and better jig tracking are shown, choose Max Mode.

To see less clutter and more fish size accuracy interpreted from the transducer beam, choose Clear Mode. See Sonar Menu Tab: SwitchFireTM for more information.

What’s on the Sonar Display

46

Freeze Frame and Active Cursor
Freeze Frame & Active Cursor – Press any arrow on the 4-WAY Cursor Control key, and the screen will freeze and a cursor will be displayed. Use the 4-WAY Cursor Control key to move the cursor over a sonar return, and the depth of the sonar return will be displayed at the top of the screen in the cursor dialog box.
The RTS WindowTM continues to update in Freeze Frame. To return to a scrolling display and exit Freeze Frame, press the EXIT key. Freeze Frame is available in the Sonar, Split Sonar, and Sonar Zoom Views.

The sonar returns from the bottom, structure, and fish can be represented as Structure ID® or WhiteLineTM. See Sonar Menu: Bottom View to set the Bottom View.
Structure ID® represents weak returns in blue and strong returns in red.

Instant Image Update
Instant Image Update – You can change a variety of sonar menu settings (such as Sensitivity or Upper Range), and the adjustments will be shown instantly on the screen.
Sonar Bottom Presentation
As the boat moves, the unit charts the changes in depth on the display to create a profile of the Bottom Contour. The type of bottom can be determined from the return charted on the display. A Hard Bottom such as compacted sediment or flat rock appears as a thinner line across the display. A Soft Bottom such as mud or sand appears as a thicker line across the display. Rocky Bottoms have a broken, random appearance.
NOTE: A sloping bottom will be represented as a thicker line across the display. Harder bottoms typically will be displayed with red and softer bottoms typically will be displayed with blue.

WhiteLineTM highlights the strongest sonar returns in white, resulting in a distinctive outline. This has the benefit of clearly defining the bottom on the display.

47

What’s on the Sonar Display

What’s on the Side Imaging® Display (898c SI and 998c SI only)

Side Imaging® displays a number of easily recognizable features that allow for accurate interpretation of bottom contour and structure. For Side Imaging®, the bottom composition determines the intensity of the sonar return. For example, rock and gravel provide a clearer sonar return than mud and sand because of their relative density. Upward slopes that face the transducer reflect sonar better than downward slopes that face away from the transducer. You can find a number of easily recognizable features on the Side Imaging® display that allow for accurate interpretation of bottom contour and structure, including the following items:

Triplog

1

2

3

4

5 6

8 Water column – Shows the relative depth of the water under

the boat at a given time. Variations in the width of the water

column show variations in the distance to the bottom as the

13

12

boat passes over.

9 Shadows – Result from a lack of reflected sonar from a particular area and can be more valuable for interpretation than the sonar
reflected by the object itself. Use shadows to help you see the

10

image in 3 dimensions, oriented in space. You can gain insight into the actual shape of an object, or the depth to which it has

9

sunk into the bottom, through shadows on the display. Objects

standing on the bottom cast a sonar shadow. The longer the

11

shadow, the taller the object. Fish also cast shadows. You can

use the shadow to interpret how close the fish is to the bottom.

15

8

10 Topography Changes – The light part of the screen shows where the beam is hitting hard bottom or rising terrain. The dark part of the screen indicates soft bottom (sand, mud) or descending terrain.

11 Bottom Return

7
1 Depth – Water depth; can be set to alarm when the water becomes too shallow. 2 Timer – Elapsed time with Speed accessory or GPS Receiver. 3 Distance – Distance traveled with Speed accessory or GPS Receiver. 4 Average Speed – Average speed reading with Speed accessory or GPS Receiver.

14
5 Barometric Pressure – Requires optionalpurchase WeatherSense®
6 Temperature – Water surface temperature 7 Speed – If a Speed accessory or GPS Receiver
is attached, the Fishing System can display the speed of the boat, and can keep a triplog of nautical or statute miles traveled.

12 Side Imaging® Range – Images shown on the right side of the screen are located on the right side of your boat, and images shown on the left side of the screen are located on the left side of your boat. In this illustration, the sonar is pinging 148 feet on each side.
13 Top of the Display – Information from the side beams are displayed at the top of the screen. As new information is received, the historical data scrolls down the screen. For the most current information, watch the top of the screen.
14 Freeze Frame & Zoom – Use the 4-WAY Cursor Control key to move the cursor to an area on the screen, and press the ZOOM+ key to see the sonar returns in greater detail.
15 Clouded Area – May indicate a bait ball and White Streaks may indicate fish.

Triplog

What’s on the Side Imaging® Display

48

Understanding the Side Imaging® Display
It is important to understand how Side Imaging® technology produces the display. The images you see on the display are produced using sonar technology. The special transducer projects three distinct beams ­ one beam facing down and two beams pointing out to the side.
Down Beam is aimed directly below the boat and provides conical coverage.
Side Beams are aimed at right angles to the path of the boat. The side beam coverage is very thin from front to back, yet very wide top to bottom. The narrow aspect (front to back) of the beam illuminates a small strip of the bottom perpendicular to the direction of t

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