Garmin Autopilot Compass / CCU Mounting Considerations

Finding the Best Mounting Location

1. Create a list of all suitable mounting locations for the CCU. Suitable mounting locations should not be within two feet of the following:

   • Iron

   • Magnets

   • High-current wires

   • Intermittently-running pumps, such as head pumps and live well pumps

   A large magnet, such as a sub-woofer-speaker magnet, should be no closer than five feet to any mounting locations.

2. Locate the center of rotation of the boat, and measure the distance between the center of rotation and each of the suitable mounting locations listed in step one

3. Select the location closest to the center of rotation. If more than one location is approximately the same distance from the center of rotation, select the location that best meets these considerations:

   • The best location is closest to the centerline of the boat

   • The best location is lower in the boat

   • The best location is slightly forward in the boat

Testing a Location for Magnetic Interference

Use a handheld compass to test a mounting location for magnetic interference.

1. Hold a handheld compass in the CCU mounting location

2. Move the compass six inches to the left of the location, then six inches to the right, observe the needle, and select an action:

   • If the compass needle moves more than three degrees during this step, magnetic interference is present. Select a new mounting location and repeat the test

   • If the compass needle does not move or moves less than three degrees, proceed to the next step

3. Repeat this process while moving the compass above and below the mounting location

4. Repeat this process while moving the compass in front of and behind the mounting location