Simrad AP28 Operator's Manual page 55

Damping
The damping factor indicates how fast the display will
respond to changes.
The higher the damping factor the more stable display
reading on the instrument.
Damping of the apparent wind angle is made by the
Advanced Wind Filter (AWF) in the Autopilot Computer.
Increasing the 'Wind damping', will make the AWF output
depend more on heading and boat speed. Decreasing the
'Wind damping', will make the AWF depend more on the
"raw" apparent wind angle data.
The speed input to the AWF is Speed Over Ground (SOG).
If SOG is not available, the AWF will use speed through
water. If none of these are available, the AWF will use a
boat speed that is 1.5 times the Transition Speed.
Range Change per step Default
0 - 9 1 4
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