Raymarine autopilot + ST4000+ - Manual (Page 126)

Chapter 7: Customizing the ST4000+ 111
7
Customiz
in
g the
ST400
0+
AutoAdapt (AUTOADAPT)
The patented AutoAdapt feature allows the ST4000+ 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.
1. Set AutoAdapt to:
• nth (north) in the northern hemisphere
• Sth (south) in the southern hemisphere
2. You then need to enter your current latitude in the next setup
screen (LATITUDE), so that the ST4000+ can provide accurate
course keeping by automatically adjusting the rudder gain
depending on the heading.
Latitude (LATITUDE)
The ST4000+ only displays this screen if you have set AutoAdapt to
nth or Sth.
Use the -1 and +1 keys to set the value to your boat’s current latitude,
to the nearest degree.
Note: If valid latitude data is available via SeaTalk or NMEA, the
ST4000+ will use this data instead of the calibration value.
D3263-2
North
without
compensation
North
with
compensation