GARMIN Reactor 40 Mechanical Configuration User Guide

REACTOR™ 40 MECHANICAL
CONFIGURATION GUIDE

Important Safety Information

WARNING
See the Important Safety and Product Information guide in the product box for product warnings and other important information.
To avoid possible personal injury and damage to your boat, the autopilot system should be installed by a qualified marine installer. Specific knowledge of marine steering and electrical systems is required for proper installation.
You are responsible for the safe and prudent operation of your vessel. The autopilot is a tool that enhances your capability to operate your boat. It does not relieve you of the responsibility of safely operating your boat. Avoid navigational hazards and never leave the helm unattended.
Always be prepared to promptly regain manual control of your boat.
Learn to operate the autopilot on calm and hazard-free open water.
Use caution when operating the autopilot near hazards in the water, such as docks, pilings, and other boats.
CAUTION
Failure to install and maintain this equipment in accordance with these instructions could result in damage or injury.
When in use, beware of hot surfaces on the heat-sink, motor, and solenoid components.
When in use, beware the risk of entrapment or pinching from moving parts.

Configuring the Autopilot

The autopilot system must be configured and tuned to your boat dynamics. You should use the Dockside Wizard and the Sea Trial Wizard to configure the autopilot. These wizards walk you through the necessary configuration steps.
If your autopilot package did not contain a helm control, you must configure the autopilot system using a compatible chartplotter on the same NMEA 2000® network as the autopilot CCU. These instructions address configuration using either a helm control or a chartplotter.

Dockside Wizard

CAUTION
When performing you perform the Dockside Wizard while your boat is either in or out of the water, provide rudder-movement clearance to avoid damage to the rudder or other objects, and use caution to avoid personal injury that may be caused by moving parts.
You can complete the Dockside Wizard while the boat is in or out of the water.
If the boat is in the water, it must be stationary while you complete the wizard.

Performing the Dockside Wizard

NOTICE
If you have a boat with a power assist steering system, turn on the power assist steering system before performing the Dockside Wizard to avoid damaging the steering system.

1. Turn on the autopilot.
   The first time you turn on the autopilot, you are prompted to complete a short setup sequence.

2. If the Dockside Wizard does not start automatically after the setup sequence, on a helm control or the autopilot screen on a chartplotter, select > Autopilot Setup > Autopilot Installation Setup > Wizards > Dockside Wizard > Begin.

3. Select the vessel type.

4. Select the drive unit class (Selecting the Drive Unit Class, page 2).

5. If you have a drive unit not sold by Garmin®, select the drive-unit voltage and the drive-unit-clutch voltage (Selecting the Drive-Unit Voltage and Drive-Unit-Clutch Voltage, page 2).

6. If you have a solenoid drive unit, select the solenoid voltage and the solenoid bypass-valve voltage (Selecting the Solenoid Voltage and Solenoid Bypass-Valve Voltage, page 3).

7. If necessary, enable the Shadow Drive™ valve (Enabling the Shadow Drive Valve, page 3).

8. Calibrate the rudder sensor (Calibrating the Rudder Sensor, page 3).

9. If you have a drive unit not sold by Garmin, tune the drive unit (Tuning an Existing Drive Unit, page 3).

10. Test the steering direction (Testing the Steering Direction, page 4).

11. If necessary, select the speed source (Selecting a Speed Source, page 4).

12. If necessary, verify the tachometer (Verifying the Tachometer, page 4).

13. Review the results of the Dockside Wizard (Reviewing the Results of the Dockside Wizard, page 4).

Selecting the Drive Unit Class
On the helm control or chartplotter, select an option:

• If you installed a Garmin Class A drive unit, select Class A.
• If you installed a Garmin Class B drive unit, select Class B.
• If you connected the autopilot to an existing solenoid drive unit, select Solenoid.
• If you connected the autopilot to an existing drive unit not sold by Garmin, select Other.

Selecting the Drive-Unit Voltage and Drive-Unit-Clutch Voltage

NOTICE
Providing an incorrect drive-unit-voltage value or drive-unit-clutch-voltage value for your drive unit can damage your drive unit.
These settings apply only to drive units not sold by Garmin.

1. Consult the manufacturer of your drive unit to determine the drive-unit voltage and drive-unit clutch voltage.
2. On the helm control or chartplotter, select the voltage approved for your drive unit.
3. On the helm control or chartplotter, select the maximum current approved for your drive unit.
4. On the helm control or chartplotter, select the voltage approved for your drive-unit clutch.

Selecting the Solenoid Voltage and Solenoid Bypass-Valve Voltage

NOTICE
Providing an incorrect solenoid-voltage value or solenoid-bypass-valve-voltage value for your drive unit can damage your drive unit.
These settings apply only to solenoid-type drive units.

1. Consult the manufacturer of your solenoid drive unit to determine the solenoid voltage and the solenoid bypass-valve voltage.
2. On the helm control or chartplotter, select the voltage approved for your solenoid drive unit.
3. On the helm control or chartplotter, select the bypass-valve voltage approved for your solenoid drive unit.

Calibrating the Rudder Sensor
NOTE: If an error appears during these steps, the rudder feedback sensor may have reached its limit. If this happens, the rudder feedback sensor may not have been installed correctly. If the problem persists, you can continue with calibration by moving the rudder to the farthest position that does not report an error.

1. Position the rudder so that the boat would steer fully starboard, and select OK.

2. After the starboard calibration is complete, position the rudder so that the boat would steer fully port, and select OK.

3. After the port calibration is complete, center the rudder position, let go, and select Begin.
   The autopilot takes control of the rudder.

4. Without touching the rudder, helm control, or chartplotter, allow the autopilot to calibrate the rudder.

5. Select an option:
   • If the calibration did not complete successfully, repeat the previous steps.
   • If the calibration completed successfully, select Next.

Enabling the Shadow Drive Valve
If you installed the autopilot on a boat with a hydraulic steering system, you can install a Garmin Shadow Drive valve (sold separately).

On the helm control or chartplotter, select an option:

• Select No if you did not install a Shadow Drive valve.
• Select Yes if you installed a Shadow Drive valve.

Tuning an Existing Drive Unit
NOTbE: This process does not apply to solenoid drive units.
If you connected the autopilot to a drive unit not sold by Garmin, you must tune the drive unit for use with the autopilot system.

1. Center the rudder position and let go of the helm.

2. Select Begin.
   The autopilot takes control of the rudder as it tunes the drive unit. A message appears on the helm control or chartplotter when the tuning is complete.

3. After the tuning is complete, select an option:
   • If the tuning is not successful, repeat the previous steps.
   • If the tuning completes successfully, select Next.

Testing the Steering Direction

1. While sitting still or moving at a low rate of speed, select < and >.
   When you select <, the rudder must turn the boat to the left. When you select

   , the rudder must turn the boat to the right.

2. Select an option:
   • If the steering test turns the boat in the correct direction, select Next.
   • If the steering test turns the boat in the opposite direction, select Switch Direction, and repeat steps 1 though 3.

Selecting a Speed Source
Select an option:

• If you connected one or more NMEA 2000 compatible engines to the NMEA 2000 network, select Tach. – N2K or Proprietary.

• If a NMEA 2000 tachometer data source is not available from one or more engines, or if it is unusable, select GPS as a speed source.
  NOTE: Garmin recommends using an external GPS antenna mounted with a clear view of the sky to provide reliable and accurate GPS speed information.

• If you did not connect a NMEA 2000 engine or GPS device as a speed source, select None.
  NOTE: If the autopilot does not perform well using None as the speed source, Garmin recommends connecting a tachometer through the NMEA 2000 network or using an external GPS antenna as the speed source.

Verifying the Tachometer
This procedure does not appear when GPS or None is selected as the speed source.
With the engine (or engines) running, compare the RPM readings on the helm control or chartplotter with the tachometer (or tachometers) on the dashboard of your boat.
If the RPM numbers do not align, there may be a problem with the NMEA 2000 speed source or connection.

Reviewing the Results of the Dockside Wizard
The values you chose when you ran the Dockside Wizard are displayed.

1. Examine the results of the Dockside Wizard.
2. Select any incorrect value.
3. Correct the value.
4. Repeat steps 2 and 3 for all incorrect values.
5. When you are finished reviewing the values, select Done.

Sea Trial Wizard
The Sea Trial Wizard configures the fundamental sensors on the autopilot, and it is extremely important to complete the wizard in conditions appropriate for your boat.
Important Sea Trial Wizard Considerations
The Sea Trial Wizard must be completed in calm water. Because the nature of calm water is relative to the size and shape of the boat, before you begin the Sea Trial Wizard, the boat must be in an appropriate location.

• The boat must not rock while sitting still or moving very slowly.

• The boat must not be significantly affected by the wind.
  While completing the Sea Trial Wizard, observe these considerations.

• Weight on the boat must remain balanced. While completing any of the steps in the Sea Trial Wizard, do not move around on the boat.

• On sailboats, the sails must be lowered.

• On sailboats, the motor must remain in a position that drives the boat in a straight direction.

Performing the Sea Trial Wizard

1. Drive your boat to an open area of calm water.

2. On a helm control or the autopilot screen on a chartplotter, select > Autopilot Setup > Autopilot Installation Setup > Wizards > Sea Trial Wizard > Begin

3. Select an option:
   • On a planing-hull power boat with the speed source set to Tach. – N2K or Proprietary, configure the planing RPM.
   • On a planing-hull power boat with the speed source set to GPS, configure the planing speed.
   • On a power boat with the speed source set to Tach. – N2K or Proprietary, configure the high RPM limit.
   • On a power boat with the speed source set to GPS, configure the maximum speed.

4. Calibrate the compass (Calibrating the Compass, page 5).

5. Perform the Autotune procedure (Performing the Autotune Procedure, page 6).

6. Set north (Setting North, page 6), or set the fine heading adjustment (Setting the Fine Heading Adjustment, page 7).

Calibrating the Compass

1. Select an option:
   • If you are performing this procedure as part of the Sea Trial Wizard, select Begin.
   • If you are performing this procedure outside of the Sea Trial Wizard, on a helm control or the autopilot screen on a chartplotter, select

   Autopilot Setup > Autopilot Installation Setup > Compass Setup > Compass Cal. > Begin.

2. Follow the directions until calibration is complete, taking care to keep the boat as steady and flat as possible.
   The boat should not list during calibration. Make sure one side of the vessel is not loaded more heavily than the other.

3. Select an option:
   • If the calibration is not successful, repeat the previous step.
   • If the calibration completes successfully, select Next.
   When the calibration is complete, a magnetic environment quality value is shown. A value of 100 indicates the CCU was installed in a perfect magnetic environment and calibrated correctly. If this value is low, you might need to relocate the CCU and calibrate the compass again.

Performing the Autotune Procedure
Before you can begin this procedure, you must have a large stretch of open water available.

1. Adjust the throttle so the boat travels at a typical cruising speed (below planing speed) that provides responsive steering.

2. Select an option:
   • If you are performing this procedure as part of the Sea Trial Wizard, select Begin.
   • If you are performing this procedure outside of the Sea Trial Wizard, on a helm control or the autopilot screen on a chartplotter, select > Autopilot Setup > Autopilot Installation Setup > Autopilot Tuning > Autotune > Begin.
   The boat performs various zigzag motions while the Autotune is in progress.

3. After the procedure is finished, follow the on-screen instructions.

4. If the Autotune procedure is not successful, select an option:
   • If the Autotune procedure is not successful and you have not reached maximum cruising speed, increase the speed, select Run Standard Autotune and repeat steps 1 through 3 until the Autotune procedure completes successfully.
   • If the Autotune procedure is not successful and you have reached maximum cruising speed, reduce your speed to the initial Autotune speed, and select Run Alternate Autotune to begin an alternate procedure.
   • If the Autotune fails immediately and you are traveling in a circle instead of performing zigzag motions, select Switch Direction > Run Standard Autotune and repeat steps 1 through 3 until the Autotune procedure completes successfully.
   When the Autotune procedure is complete, gain values are displayed. You can use these values to determine the quality of the Autotune procedure.

Autotune Gain Values
After the Autotune procedure is complete, you can review the gain values provided on the helm control. You can record these numbers for reference if you want to run the autotune procedure at a later time or if you want to manually adjust the gain settings (not recommended) (Adjusting the Autopilot Gain Settings, page 8).
Gain: Sets how tightly the autopilot holds the heading and how aggressively it makes turns.
Counter Gain: Sets how aggressively the autopilot adjusts any over-steering after making a turn.

Setting North
Before you can begin this procedure, you must have a large stretch of open water available.
This procedure appears if the autopilot is connected to an optional GPS device, and the device has acquired a GPS position. During this procedure, the autopilot aligns the compass heading with the Course over Ground (COG) information from the GPS device.
If you do not have a GPS device connected, you are prompted to set the fine heading adjustment instead (Setting the Fine Heading Adjustment, page 7).

1. Drive your boat at in a straight line at cruising speed, downwind, and in the same direction as the current.

2. Select an option:
   • If you are performing this procedure as part of the Sea Trial Wizard, select Begin.
   • If you are performing this procedure outside of the Sea Trial Wizard, on a helm control or the autopilot screen on a chartplotter, select > Autopilot Setup > Autopilot Installation Setup > Compass Setup > Set North > Begin.

3. Continue to drive the boat in a straight line at cruising speed, downwind, in the same direction as the current, and follow the on-screen instructions.

4. Select an option:
   • If the calibration is not successful, repeat the previous step.
   • If the calibration completes successfully, select Next.

Setting the Fine Heading Adjustment

This procedure appears only if you do not have an optional GPS device connected to the autopilot. If the autopilot is connected to a GPS device that has acquired a GPS position, you are prompted to set north instead (Setting North, page 6).

• Select an option:
  • If you are performing this procedure as part of the Sea Trial Wizard, proceed to step 2.
  • If you are performing this procedure outside of the Sea Trial Wizard, on a helm control or the autopilot screen on a chartplotter, select > Autopilot Setup > Autopilot Installation Setup > Compass Setup > Fine Heading Adjustment.

• Adjust the fine heading setting until it shows the correct heading as determined by a trusted heading indicator, such as the ship compass or a handheld compass.

• Select Back.
  Testing and Adjusting the Configuration

NOTICE
Test the autopilot at a slow speed. After the autopilot has been tested and adjusted at a slow speed, test it at a higher speed to simulate normal operating conditions.

1. Drive the boat in one direction with the autopilot engaged (heading hold).
   The boat may oscillate slightly, but it should not oscillate significantly.

2. Turn the boat in one direction using the autopilot and observe the behavior.
   The boat should turn smoothly, not too quickly or too slowly.
   When you turn the boat using the autopilot, the boat should approach and settle on the desired heading with minimal overshoot and oscillation.

3. Select an option:
   • If the boat turns too quickly or too sluggishly, adjust the autopilot acceleration limiter (Adjusting the Acceleration Limiter Settings, page 7).
   • If the heading hold oscillates significantly or the boat does not correct when turning, adjust the autopilot gain (Adjusting the Autopilot Gain Settings, page 8).
   • If the boat turns smoothly, the heading hold oscillates only slightly or not at all, the boat adjusts the heading correctly, the configuration is correct. No further adjustments are necessary.

Adjusting the Acceleration Limiter Settings

1. On a helm control or the autopilot screen on a chartplotter, select > Autopilot Setup > Autopilot Installation Setup > Autopilot Tuning > Accel. Limiter.

2. Select an option:
   • Increase the setting if the autopilot turns too quickly.
   • Decrease the setting if the autopilot turns too slowly.
   When you manually adjust the acceleration limiter, make relatively small adjustments. Test the change before making additional adjustments.

3. Test the autopilot configuration.

4. Repeat steps 2 and 3 until the autopilot performance is satisfactory.

Adjusting the Autopilot Gain Settings
The autopilot gain settings are set during the Autotune procedure. Adjusting these values is not recommended, and you should record the values set by the Autotune procedure before making any changes.

1. On a helm control or the autopilot screen on a chartplotter, select > Autopilot Setup > Autopilot Installation Setup > Autopilot Tuning > Rudder Gains.

2. Select an option based on the type of boat:
   • If you have a sailboat, a displacement-hull powerboat, or a powerboat with the speed source set to None, select Gain and adjust how tightly the rudder holds the heading and makes turns.
   If you set this value too high, the autopilot may be overactive and attempt to constantly adjust the heading at the slightest deviation. An overactive autopilot can drain the battery at a faster-than-normal rate.
   • If you have a sailboat, a displacement-hull powerboat, or a powerboat with the speed source set to None, select Counter Gain and adjust how tightly the rudder corrects the turn overshoot.
   If you set this value too low, the autopilot can overshoot the turn again when it attempts to counter the original turn.
   • If you have a planing-hull powerboat with the speed source set to Tach. – N2K or Proprietary, Tachometer, or GPS, select Low Speed or High Speed and adjust how tightly the rudder holds the heading and makes turns at low speed or high speed.
   If you set this value too high, the autopilot may be overactive and attempt to constantly adjust the heading at the slightest deviation. An overactive autopilot can drain the battery at a faster-than-normal rate.
   • If you have a planing-hull powerboat with the speed source set to Tach. – N2K or Proprietary, Tachometer, or GPS, select Low Spd. Cntr. or High Speed Counter to adjust how tightly the rudder corrects the turn overshoot.
   If you set this value too low, the autopilot can overshoot the turn again when it attempts to counter the original turn.

3. Test the autopilot configuration, and repeat step 2 until the autopilot performance is satisfactory.

Advanced Configuration Settings

You can calibrate the compass, run the autotune procedure, and set north on the autopilot without running the wizards. You can also manually define each setting individually, in order to make slight adjustments, without running the full configuration or calibration processes.

Manually Running the Automated Configuration Processes

1. On a helm control or the autopilot screen on a chartplotter, select > Autopilot Setup > Autopilot Installation Setup.

2. Select an automated process:
   • To start the compass calibration procedures, select Compass Setup > Compass Cal. (Calibrating the Compass, page 5).
   • To start the automatic autopilot tuning procedures, select Autopilot Tuning

   Autotune (Performing the Autotune Procedure, page 6).
   • To start the procedures to define north, select Compass Setup > Set North (Setting North, page 6).

3. Follow the on-screen instructions.

Manually Defining Individual Configuration Settings
Configuring certain configuration settings may require you to modify other settings. Review the detailed configuration settings section prior to modifying any settings (Detailed Configuration Settings, page 10).

1. On a helm control or the autopilot screen on a chartplotter, select > Autopilot Setup > Autopilot Installation Setup.

2. Select a setting category.

3. Select a setting to configure.
   Descriptions of each setting are available in this manual (Detailed Configuration Settings, page 10).

4. Configure the value of the setting.

Manually Adjusting the Settings for an Existing Unit

NOTICE
Providing an incorrect Drive Unit Voltage or Max. Current value for your existing drive unit can damage your drive unit.

1. On a helm control or the autopilot screen on a chartplotter, select > Autopilot Setup > Autopilot Installation Setup > Steering System Setup > Drive Class.
2. Select Other or Solenoid, according to the setting chosen in the Dockside Wizard.
3. Select an option:
   • Select Generic Tune to re-run the tuning procedure you completed during the Dockside Wizard (Tuning an Existing Drive Unit, page 3).
   • Select Drive Unit Voltage to adjust the drive-unit voltage according to the specifications provided by your drive-unit manufacturer.
   • Select Clutch Voltage to adjust the clutch voltage according to the specifications provided by your drive-unit manufacturer.
   • Select Max. Current to set the drive-unit-rated current value according to the specifications provided by your drive-unit manufacturer.
   • Select Restore Defaults to reset the existing-drive-unit settings to the default values.
   After you reset the drive-unit settings to the default values, you must perform the Generic Tune procedure (Tuning an Existing Drive Unit, page 3).
   If you adjust any of these values or run any of these tuning procedures, you must perform the autotune procedure again.

Multiple Sources of Sensor Information
There may be multiple sources of sensor information available to the autopilot system. If so, you can select a preferred data source.
For example, because GPS speed from an external antenna is more reliable and accurate than that from an integrated GPS receiver inside a chartplotter, you should select the external GPS antenna as the preferred source of GPS data. Also, because it can be difficult to find an ideal mounting location for the autopilot CCU, you can optionally select an external NMEA 2000 GPS compass or other heading sensor as the preferred source of heading data.

Selecting a Preferred Source of Sensor Information

1. On a helm control or the autopilot screen on a chartplotter, select > Autopilot Setup > Preferred Sources.
   NOTE: Some items in the Preferred Sources menu are shown only when multiple sensors providing the same data are available to the system.

2. Select a data category.

3. Select a source.

Detailed Configuration Settings

Although all of the configuration is typically completed automatically through wizards, you can manually adjust any setting to fine-tune the autopilot.
NOTE: Depending upon the configuration of the autopilot, certain settings may not appear.
NOTE: On a powerboat, each time you change the Speed Source setting, you must review the Low RPM Limit, High RPM Limit, Planing RPM, Planing Speed, or Max. Speed settings, where applicable, and you must perform the autotune procedure again (Performing the Autotune Procedure, page 6).

Autopilot Tuning Settings
On a helm control or the autopilot screen on a chartplotter, select > Autopilot Setup > Autopilot Installation Setup > Autopilot Tuning.
Autotune: Starts the Autotune procedure (Performing the Autotune Procedure, page 6).
Rudder Gains: Adjusts the rudder-gain settings (Rudder Gain Settings, page 11).
Accel. Limiter: Allows you to limit the speed of autopilot-controlled turns. You can increase the percentage to limit the turn rate, and decrease the percentage to allow a higher turn rate.

Speed Source Settings
On a helm control or the autopilot screen on a chartplotter, select > Autopilot Setup > Autopilot Installation Setup > Speed Source Setup.
Speed Source: Allows you to select the speed source.
Verify Tachometer: Allows you to compare the RPM readings on the helm control or chartplotter with the tachometers on the dashboard of your boat.
Planing RPM: Allows you to adjust the RPM reading on the helm control or chartplotter at the point when your boat transitions from displacement to planing speed. If the value does not match the value on the helm control or chartplotter, you can adjust the value.
Low RPM Limit: Allows you to adjust the lowest RPM point of your boat. If the value does not match the value on the helm control or chartplotter, you can adjust the value.
High RPM Limit: Allows you to adjust the highest RPM point of your boat. If the value does not match the value on the helm control or chartplotter, you can adjust the value.
Planing Speed: Allows you to adjust the planing speed of your boat. If the value does not match the value on the helm control or chartplotter, you can adjust the value.
Max. Speed: Allows you to adjust the maximum speed of your boat. If the value does not match the value on the helm control or chartplotter, you can adjust the value.

Rudder Gain Settings
NOTE: If you set these values too high or too low, the autopilot may become overactive, attempting to constantly adjust the heading at the slightest deviation. An overactive autopilot can cause excess wear on the pump and drain the battery at a faster-than-normal rate.
On a helm control or the autopilot screen on a chartplotter, select > Autopilot Setup > Autopilot Installation Setup > Autopilot Tuning > Rudder Gains.
NOTE: These settings apply only to displacement-hull powerboats, powerboats with the speed source set to None, sailboats, and sailing catamarans.
Gain: Allows you to adjust how tightly the rudder holds a heading and makes turns.
Counter Gain: Allows you to adjust how tightly the rudder corrects turn overshoot. If you set this value too low, the autopilot can overshoot a turn when attempting to counter the original turn.
NOTE: These settings apply only to planing-hull powerboats with the speed source set to Tach. – N2K or Proprietary, Tachometer, or GPS.
Low Speed: Allows you to set the rudder gain for low speeds. This setting applies when the vessel operates below planing speed.
Low Spd. Cntr.: Allows you to set the rudder gain counter-correction for low speeds. This setting applies when the vessel operates below planing speed.
High Speed: Allows you to set the rudder gain for high speeds. This setting applies when the vessel operates above planing speed.
High Speed Counter: Allows you to set the rudder gain counter-correction for high speeds. This setting applies when the vessel operates above planing speed.

Steering System Settings
On a helm control or the autopilot screen on a chartplotter, select > Autopilot Setup > Autopilot Installation Setup > Steering System Setup.
Steering Dir.: Sets the direction the rudder must move to turn the vessel to port and to starboard. You can test and reverse the steering direction if necessary.

Rudder Sensor Settings
NOTE: Rudder sensor settings apply only when a rudder sensor is connected to the autopilot system.
On a helm control or the autopilot screen on a chartplotter, select > Autopilot Setup > Autopilot Installation Setup > Steering System Setup > Rudder Sensor Setup.
Calib. Rudder: Initiates a procedure that establishes the maximum range of movement of the rudder and calibrates the rudder-position sensor. If an error appears during the calibration, the rudder-position sensor has likely reached its limit. The sensor might not be correctly installed. If the problem persists, you can bypass this error by moving the rudder to the farthest position that does not report an error.
Calib.
Center: Initiates a procedure that establishes the center position of the rudder. You can use this calibration if the on-screen rudder position indicator does not match the true rudder center on your boat.
Max. Port Angle: Allows you to enter the angle at which your rudder turns furthest port.
Max. Stbd. Ang.: Allows you to enter the angle at which your rudder turns furthest starboard.

© 2022 Garmin Ltd. or its subsidiaries Garmin® and the Garmin logo are trademarks of Garmin Ltd. or its subsidiaries, registered in the USA and other countries. Reactor™ and Shadow Drive™ are trademarks of Garmin Ltd. or its subsidiaries. These trademarks may not be used without the express permission of Garmin.
NMEA 2000® and the NMEA 2000 logo are trademarks of the National Marine Electronics Association.

© 2022 Garmin Ltd. or its subsidiaries
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