Autoadapt; Latitude - Raymarine ST600R Owner's Handbook Manual

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Note: If valid latitude data is available via SeaTalk, it will be used instead of

AutoAdapt

The patented AutoAdapt feature allows the autopilot to compensate
for heading errors at higher latitudes, which are caused by the
increasing dip of the earth's magnetic field. The increased dip has the
effect of amplifying rudder response on northerly headings in the
northern hemisphere, and on southerly headings in the southern
hemisphere.
Set AutoAdapt to "nth" in the northern hemisphere, or "sth" in the
southern hemisphere. You then need to enter your current latitude in
the next setup screen, so that the autopilot can provide accurate
course keeping by automatically adjusting the rudder gain
depending on the heading.
Range:
Default:

Latitude

This screen is only used if AutoAdapt is set to North or South.
Use the +1, -1, +10, and -10 keys to set the value to your vessel's
current latitude, to the nearest degree.
Range:
Default:
this calibration value.
ST600R Autopilot Control Unit
0ff = Off
nth = North
Sth = South
Off
0 to 80°
Off