Performing Basic Calibration
If you connect the compass to a NMEA 2000 network without a compatible Garmin chartplotter or with a third-
party display device, you must perform basic calibration instead of menu-based calibration.
Before you can perform basic calibration, you must be able to view heading data from the NMEA 2000 network
on a connected device. To perform basic calibration, you must remove from the network all sources of heading
data other than the compass.
When performing basic calibration, you first calibrate the compass and then align the heading in one
continuous procedure.
NOTE: The boat must be able to reach a cruising speed of at least 6.4 km/h (4 mph) to perform the heading
alignment.
1 Drive the boat to a location with calm, open water.
2 Set the display to view heading data from the connected compass.
NOTE: You must not use GPS Course Over Ground (COG) to perform basic calibration.
3 Disconnect the compass from the NMEA 2000 network or turn off the power to the NMEA 2000 network.
4 Wait while the boat becomes level and stationary.
5 Turn on power to the compass, and wait until the heading data appears on the display .
NOTE: If you are performing the first basic calibration after a factory reset, the heading is blank.
6 Within three minutes, complete two full, slow, tight circles , taking care to keep the boat as steady and
level as possible.
The boat should not list during calibration.
When the compass is prepared to calibrate the compass, the heading data disappears from the display
You may receive an error message that the heading was lost. You can ignore this message.
7 Continue turning in the same direction at the same speed for approximately 1
1
/
2
rotations until the
heading data appears .
9
