18 ST4000 Plus Wheel & Tiller Autopilots Owner’s Handbook
Cr o ss t r a ck e r r o r
Cross track error (XTE) is the distance between the current position
and a planned route. This is displayed in nautical miles (nm), statute
miles (SM ) or kilometres, and is taken directly from your navigator.
The Large Cross Track Error alarm sounds if the cross track error
exceeds 0.3†nm.
ïThe direction of the error is identified as port (Pt) or starboard (Stb).
ïTo cancel the alarm, press st a ndby to return to hand steering, or
auto to return to Auto mode and retain the current heading.
Note: If the Large Cross Track Error alarm sounds, it is usually an
indication that the cross tide is too great for the vesselís current speed.
Tidal st ream compensat ion
Under most conditions, Track mode will hold the selected track to
within ±0.05†nm (300†ft) or better.
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