7.10 Compass lock
Once you are satised with the compass accuracy,
you can lock the setting to prevent the autopilot
system from completing a further automatic
linearization in the future.
This feature is particularly useful for vessels in
environments that are exposed to strong magnetic
disturbances on a regular basis (such as offshore
wind farms or very busy rivers, for example). In these
situations it may be desirable to use the Compass
lock feature to disable the continuous linearization
process, as the magnetic interference may build a
heading error over time.
Note: The compass lock may be released at any
time, to allow the compass continuous linearization
to restart. This is particularly useful if planning a
long voyage. The earth’s magnetic eld will change
signicantly from one geographical location to
another, and the compass can continuously
compensate for the changes, ensuring you
maintain accurate heading data throughout the
voyage.
Locking the compass
Follow the steps below to lock the compass
linearization.
From the Commissioning menu: (Menu > Set-up >
Autopilot Calibration > Commissioning)
1. Select Compass Lock.
2. Select On.
The compass linearization is now locked.
Commissioning - Evolution autopilot system
47
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