64 ST6001+ Autopilot Control Unit - Owner’s Handbook6 Commissioning the AutopilotCalibrating the compassNote: This section does not apply if you have connected an NMEAcompass to your autopilot system. Refer to the handbook suppliedwith the NMEA compass for information about calibration.Depending on your boat type, deviating magnetic fields can causesignificant compass errors. The correction procedure reduces theseerrors to a few degrees, so you MUST perform this procedure as thefirst item in your initial seatrial. The autopilot will then automaticallycorrect the fluxgate compass.CAUTION:If you fail to complete the deviation correction, your autopilot’sperformance will be impaired on some compass headings.The deviation correction procedure (swinging the compass) involvesturning your boat in slow circles so the autopilot can determine thedeviation and calculate any correction required. You must carry outthis procedure in calm conditions and preferably on flat water.Automatic compass deviation correction1. With the pilot in Standby mode, enter Seatrial Calibration asfollows (see the following illustration):• press and hold the standby key for two seconds to enterCalibration mode• when you see the DISPLAY CAL screen, press the disp key untilyou see the SEATRIAL CAL screen• press the auto key to enter Seatrial CalibrationNote: If you cannot access SeaTrial Calibration, you need to turn offthe calibration lock in Dealer Setup (see page 88).2. You should see the SWING COMPASS screen when you first enterSeatrial Calibration. (If not, use the disp key to page through theSeatrial Calibration items until you see SWING COMPASS)3. When you are ready to start, press the +1 key to selectSWING COMPASS On. You will then see the TURN BOAT screen.
