48 RayPilot 650 Control Unit - Owner’s Handbook
5 Commissioning the Autopilot
Note: If the deviation figure exceeds 15° or the display shows no
deviation value, the compass is being affected by ferrous objects on
your boat. You should move the compass to a better location. Higher
deviation figures are acceptable on steel boats.
Aligning the compass heading
1. Once the deviation is displayed, manually steer the boat on a
steady course at a speed which enables you to hold that course.
2. Use the course change knob to adjust the displayed heading until
it matches the boat’s steering compass or a known transit bearing.
3. Press and hold
STBY for 2 seconds to exit Compass Calibration
and save the new compass settings.
Note: To exit without saving changes, press
STBY momentarily.
Adjusting the heading alignment
If you experience difficulties with compass alignment, you can check
the compass alignment after completing the deviation correction
procedure (swinging the compass). After completing the initial
compass calibration, you can make further adjustments to the
alignment without swinging the compass again.
Although the compass calibration removes most of the alignment
error, small errors (of the order of a few degrees) will probably
remain. These will vary depending on the heading.
Ideally, you should check the heading reading against a number of
known headings, plot a deviation curve, and determine the heading
alignment value that will give the lowest average alignment error.
You can then enter this value on the Heading Alignment screen, as
described above.
If the average heading error is more than 5°, you should perform the
compass deviation correction procedure again, circling more slowly
and in more favorable conditions.
Further adjustments to heading alignment
If the heading alignment requires further adjustment after the seatrial:
1. Enter Compass Calibration by pressing
STBY for 4 seconds.
2. Use the course change knob to adjust the displayed heading until
it matches the boat’s steering compass or a known transit bearing.
3. Press
STBY for 2 second to save changes and return to Standby.
81013_4.book Page 48 Wednesday, July 25, 2001 11:04 AM
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