should move the compass to a different location. The (local) field
angle guides you to the local interfering magnetic object.
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Note: In certain areas and at high latitudes the local magnetic
interference becomes more significant, and heading errors
exceeding ±3° may have to be accepted.
Automatic calibration
An auto calibration option is available for compasses that offers a
fully automatic calibration procedure.
See more instructions in the documentation delivered with your
compass.
Magnetic variation
Defines how magnetic variation is handled by the system.
• Auto: Receives variation data from a network source
• Manual: Used for manually entering a value for the magnetic
variation
Use COG as heading
If heading data is not available from a compass sensor, it is possible
to use COG from a GPS. COG will be used in the true wind
calculations.
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Note: The autopilot cannot be operated using COG as the
heading source. COG cannot be calculated when stationary.
Pitch/Roll
If a suitable sensor is fitted, the system will monitor the inclination of
the vessel. The offset value should be entered to adjust the readings
so that while the vessel is stationary at the dock, the Pitch and Roll
value reads 0.
Environment
If a suitable sensor is fitted, the system will monitor the current
sea/air temperature and barometric pressure.
The offset value to be entered should adjust the reading from the
sensor to match a calibrated source.
58
Software setup | IS42 Operator Manual
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