TMQ Bosun-AP9, Operation And Installation Manual

Page: 40 / 63

TMQ Bosun - AP9 Rev1 (935) Page 40 16/06/2003
This completes the compass calibration. Check alignment of the Bosun
compass by steering vessel due North (000 on ships compass) and, if
necessary, rotate outer case of the Bosun compass in its bracket until the
heading display reads 000.
Note: The effectiveness of the calibration is dependent upon all 3
steps being completed. Should you wish to abort the
calibration procedure at any time during the circle turning,
do not carry out step 3.
It is important to realise that on any vessel the ships compass can have
heading errors as a result of the vessels magnetic signature. These errors
can be minimised by having the ships compass swung and compensated by
a licensed compass adjuster. In any case it is highly unlikely that the ships
compass and autopilot compass will be congruent for every heading.
If you are unsure of the success of the calibration, you may return to the
factory calibration setting by entering "903", hold down
GOTO , press
STANDBY , then release both buttons together. ‘ rES ’ will be displayed for
approximately 1 second.