Cross Track Error; Tidal Stream Compensation - Raymarine ST5000+ Owner's Handbook Manual

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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.
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
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.

Tidal stream compensation

Under most conditions, Track mode will hold the selected track to
within ±0.05 nm (300 ft) or better.
to hand steering, or auto to return to Auto mode and retain the
current heading.
ST5000 Plus SailPilot Owner's Handbook