52 SportPilot and SportPilot Plus - Owner’s Handbook
5 Compass Calibration
5.1 Compass linearization and heading alignment
This procedure reduces any fluxgate compass errors caused by
ferrous objects.
1. Motor the boat to a location clear of any other traffic. Sea
conditions should be calm with minimal tidal flow.
2. Select Standby mode, and then press in and hold the end of the
control stalk (
NAV) for 10 seconds. The red AUTO and yellow
NAV lights will then flash alternately and the unit will beep every
second.
3. Turn the boat in a slow circles:
• the boat speed should not exceed 3 knots
• you should take at least 2 minutes to complete 360°
4. Keep turning your boat in circles until the SportPilot indicates
that compass linearization is complete by:
• flashing the red
AUTO and yellow NAV lights together, and
• emitting a 5 second beep
D1521-2
• at least 2 mins for each 360˚
• speed below 3 knots
D5556-1
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