Seiwa SW AP03 - Manual (Page 24)

Note. If a rate gyro is fitted, it is turned off automatically by selecting the calibration
option and should be turned on again when calibration is complete.
Manual calibration can be carried out independently of auto
calibration, but is best done after an auto calibration procedure.
Press the right arrow for the following display: (All settings are
initially zero after an auto calibration, but the settings from any previous manual calibration
are shown.)
HEADING 225
+00
+00
+00 +00
+00 +00
+00 +00
Turn the vessel to a heading which is close to one of the cardinal or
inter-cardinal points, ie.
000, 045, 090, 135, 180, 225, 270, or 315.
Then use the arrow keys to adjust the deviation up or down until the heading agrees
with that of the ship's compass or other reference compass. Turn
to the next point and repeat the procedure until all eight have been
checked or adjusted. Press STANDBY.
Manual calibration may be fine-tuned at any time by selecting this function and
turning, for example, to just one cardinal point which may need
adjustment. Note that all calibration settings are cleared when a
COLD START is carried out.
This option restores the original factory preset parameters in the
autopilot and should be used if there has been some malfunction or
if new software has been installed. When the prompt appears,
press the right arrow. After the presets have been re-loaded, the
screen shows:
22
COLD START
PRESS STANDBY
22
Manual
Compass
Calibration
Cold Start