Why is the vessels heading offset by a fixed amount from its actual reading even though it is updating?
The heading device could be outputting Magnetic instead of True Heading or simply could be outputting heading incorrectly. Look at the attached Heading Device (or its User Manual) to see if it outputs Magnetic or True Heading. Ensure that the setting is set to True Heading. Many heading devices need to be reset on Start-up as they dont actually output True Heading information, but rather changes in heading. For example, a gyro repeater is attached to the system via a converter from analog voltage output to NMEA sentences. The converter must be set to the vessels heading at Start-up as the repeater will only send signals when there is a change in heading, not an absolute heading number. If this configuration (or one similar to it) is the case and the heading is offset from reality, check the converter for this setup function. ICAN software allows for a Manual Heading Offset to be applied to heading information from within the software itself. Select Main from the Menu Bar and then selec
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