Manual Garmin GHP 12 Autopilot System (page 15 of 28) (English)

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GHP12InstallationInstructions 15





1. Test the autopilot at a slow speed.

2. If necessary, adjust the gain setting.

3. If necessary, adjust the acceleration limiter setting.

4. Test the autopilot at a higher speed (normal operating conditions).

5. If necessary, adjust the gain and acceleration limiter settings.



1. Drive the boat in one direction with the autopilot engaged (heading

hold).

The boat should not oscillate signicantly; however, a small amount

of oscillation is normal.

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 (page 15).

• If the heading hold oscillates signicantly or the boat does not

correct when turning, adjust the autopilot gain (page 15).

• If the boat turns smoothly, the heading hold oscillates only

slightly or not at all, and the boat adjusts the heading correctly,

proceed to step 5.

4. Repeat steps 2 and 3 until the boat turns smoothly the heading hold

oscillates only slightly or not at all, and the boat adjusts the heading

correctly.

5. Repeat steps 1–4 at faster speeds.



NOTE: When you manually adjust the acceleration limiter, make

relatively small adjustments. Test the change before making additional

adjustments.

1. Turn on the GHP 12 using the advanced conguration power-on

procedure (page 16).

2. On the GHC 10, select Menu > Setup > Dealer Autopilot

Conguration > Autopilot Tuning > Acceleration Limiter.

3. Select an option:

• Increase the setting if the autopilot turns too quickly,

• Decrease the setting if the autopilot turns too slowly.

4. Test the autopilot conguration, and repeat steps 2 and 3 until the

GHP 12 performance is satisfactory.



NOTE: When you manually adjust the rudder gain (or counter gain),

make relatively small adjustments, and adjust only one value at a time.

Test the change before making additional adjustments.

1. Turn on the GHP 12 on using the advanced conguration power-on

procedure (page 16).

2. On the GHC 10, select Menu > Setup > Dealer Autopilot

Conguration > Autopilot Tuning > Rudder Gains.

3. Select an option:

• Select Rudder Gain to adjust how tightly the rudder holds the

heading and makes turns. If you set this value too high, the

autopilot may be overactive, attempting to constantly adjust

the heading at the slightest deviation. An overactive autopilot

can cause excess wear and tear on the drive unit, and drains the

battery at a faster-than-normal rate.

• Select Counter Gain to adjust how tightly the rudder corrects

the turn overshoot. If you set this value too high, the autopilot

can overshoot the turn again when attempting to counter the

original turn.

4. Test the autopilot conguration, and repeat steps 2 and 3 until the

GHP 12 performance is satisfactory.

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Garmin GHP 12 Autopilot System Manual

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