Garmin GHP Reactorâ„¢ Steer-by-wire Corepack for Viking VIPER - Page 6

Magnetic Environment: Indicates the level of distortion of the Earth's magnetic field at the mounting location. • A value of 100 indicates the device experiences no magnetic interference at the mounting location. • If this value is low, you might need to move the CCU and calibrate the compass again. • A value of 100 is ideal, but it is not necessary for the autopilot to function correctly. If the CCU is mounted in an optimal location on your boat, you should continue configuring the autopilot and evaluate the performance again later. Spin Quality: Represents how level the boat remained during the compass-calibration process. • A value of 100 indicates the boat remained perfectly level during compass calibration. • If this value is low, you might need to 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 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, from the heading screen, select Menu > Setup > Dealer Autopilot 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 Select an option: • If the Autotune procedure is not successful, but you have not reached maximum cruising speed, increase the speed 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 Alternate Autotune to begin an alternate procedure. 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). 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. NOTE: If you followed the guidelines when mounting the CCU, this procedure may not be necessary (CCU Mounting and Connection Considerations). This procedure appears if the autopilot is connected to an optional GPS device (Connecting Optional NMEA 2000 Devices to the Autopilot System), and the device has acquired a GPS position. During this procedure, the autopilot uses the GPS heading information to calibrate north on the autopilot system. If you do not have a GPS device connected, you are prompted to set the fine heading adjustment instead (Setting the Fine Heading Adjustment). 1 Drive your boat at cruising speed in a straight line. 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, from the heading screen, select Menu > Setup > Dealer Autopilot Setup > Compass Setup > Set North > Begin. 3 Continue to drive the boat at cruising speed in a straight line and follow the on-screen instructions. 4 Select an option: • If the calibration completes successfully, select Done. • If the calibration is not successful, repeat steps 1 through 3. Setting the Fine Heading Adjustment This procedure appears only if you do not have an optional GPS device connected to the autopilot (Connecting Optional NMEA 2000 Devices to the Autopilot System). If the autopilot is connected to a GPS device that has acquired a GPS position, you are prompted to set north instead (Setting North). 1 Using a handheld compass, identify north. 2 Select an option: • If you are performing this procedure as part of the Sea Trial Wizard, adjust the fine heading setting until it matches north on the magnetic compass. • If you are performing this calibration outside of the Sea Trial Wizard, from the heading screen, select Menu > Setup > Dealer Autopilot Setup > Compass Setup > Fine Heading Adjustment, and adjust the fine heading setting until it matches north on the magnetic compass. 3 Select Done. 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). • If the heading hold oscillates significantly or the boat does not correct when turning, adjust the autopilot gain (Adjusting the Autopilot Gain Settings). • If the boat turns smoothly, the heading hold oscillates only slightly or not at all, and the boat adjusts the heading correctly, the configuration is correct, and no further adjustments are necessary. 6