Average Heading; Resetting The Average Heading - Raymarine Compass Manual

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4.3 Average Heading

The compass continuously calculates the average course steered. This is
independent of whether the compass is in Lock mode.
To display the average course, simply press
momentarily.
LOCK
HEADING
N
AVERAGE
LOCK
The average course is displayed for 8 seconds at which time the display
reverts to the lock display.

Resetting the Average Heading

With the average heading displayed, simply press and hold
together for 3 full seconds to reset the average (the compass beeps
once to indicate that the average heading is being reset).
Please note...
After 24 hours of continuous operation, the compass will stop calculating
the average heading and the display will flash.
ST30 Compass Installation and Operation Handbook
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