Simrad AP26 and AP27 Autopilots
Compass Offset
After calibration, also check the compass readout against a known reference, a compensated compass or a bearing. If the reading has a fixed offset, proceed to next menu item by pressing STBD button or return to STANDBY mode by pressing the STBY button.
Note ! Offset correction is always performed after the calibration. If you use COG as a reference for the offset remember it has to be a magnetic reading.
The compass OFFSET feature allows you to correct for a fixed heading offset. This offset may be present as a result of the compass being installed with a lubber line offset or if a fixed offset remains after the calibration procedure has been completed. The value of compass offset is specific to the heading sensor that is selected at the time the offset is entered. This means that you can have individual offsets for each compass installed.
Select the amount of correction by turning the course knob to offset the heading to agree with the known, accurate heading. The Offset value can be either positive or negative.
Note ! If an OFFSET still exists after having compensated for it, one of the following problems may still exist:
•The heading reference to which you are comparing the compass is not correct.
•The automatic calibration is not correct. Refer to above “Compass deviation”.
Proceed to the next menu item by pressing the STBD button, or return to Standby mode by pressing the STBY button.
100 | 20221586B |
