Automatic Compass Deviation Correction - Raymarine ST5000+ Owner's Handbook Manual

Chapter 6: Post Installation Procedures

Automatic compass deviation correction

• Automatic compass deviation correction
• Heading alignment adjustment
• Autopilot operation check
• Rudder gain adjustment
Note: The ST5000 Plus has a built-in calibration capability which
enables it to be fine tuned to suit the individual vessel, its steering
system and dynamic steering characteristics. As supplied from the
factory the unit is calibrated to provide safe stable autopilot control for
the majority of vessels.
The initial sea trial should be performed in the following
circumstances:
• After all the installation, functional test and dockside procedures
have been completed successfully
• Before any other changes have been made to the default calibration
settings: check and, if necessary, reset the values to the
recommended levels, as described in Chapter 4
• In conditions of light wind and calm water, so that autopilot
performance can be assessed without the influence of strong winds
or large waves
• In waters clear of any obstructions
Note: At any time during the sea trial you can press standby to return
to hand steering.
The ST5000 Plus will correct the fluxgate compass for most deviating
magnetic fields. Compass errors due to deviating magnetic fields can
be up to 15°, depending on your vessel type. The correction procedure
reduces these to a few degrees, so it is essential to perform the
procedure as the first item in your initial sea trial.
CAUTION:
Failure to carry out the deviation correction may result in
impaired autopilot performance on some compass headings.
To allow the system to determine the deviation and calculate any
correction required, you must turn your vessel in slow circles. This
procedure must be carried out in calm conditions and preferably in flat
water.
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