Cross Track Error - Raymarine ST5000+ Owner's Handbook Manual

14 ST5000 Plus Sterndrive & Hydraulic Autopilots Owner's Handbook
• Make positive positional checks at regular intervals, especially if
navigational hazards are close by.

Cross track error

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.
D3506-1
The Large XTE alarm sounds if the XTE exceeds 0.3 nm
The direction of the error is identified as port (Pt) or starboard (Stb).
To cancel the alarm and leave track mode, press standby to return to
hand steering, or auto to return to Auto mode and retain the current
heading.
Note: If the Large XTE alarm sounds, it is usually an indication that
the cross tide is too great for the vessel's current speed.