Large Cross Track Error; Tidal Stream Compensation - Raymarine SmartPilot X-5 Operating Manual

18 SmartPilot X-5 Tiller & GP Tiller Operating Guide
The Raymarine Track keeping algorithm ensures safe operation by correcting any
XTE as quickly as possible, but with a maximum convergence angle of 30º with the
Track Leg. It then maintains the vessel tightly on the desired track.

Large cross track error

If a cross track error of greater than 0.3 nm occurs, the SPX-5 Tiller system will sound
a Large Cross Track Error warning and the Pilot Controller will show whether you are
to the port (Pt) or starboard (Stb) of the planned track.
Waypoint 2
Cross track error (XTE)
more than 0.3 nm
Waypoint 1

Tidal stream compensation

Under most conditions, the SPX-5 Tiller system will hold the selected track to within
±0.05 nm (300 ft) or better. It takes account of the boat's speed when computing
course changes to ensure optimum performance.
Waypoint 2
Boat's speed over ground
Tidal component
Boat's speed through water
Waypoint 1
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