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Course to Steer with Tidal Stream

Course-to-steer and speed-over-ground when a tidal stream sets across the track. Vector triangle closure.

NavigationCurrents
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Formula, assumptions, and limits

Vground=Vwater+Vcurrent\vec V_\text{ground} = \vec V_\text{water} + \vec V_\text{current}
SymbolMeaningUnit
CMGCMGCourse made good (track)°T
STWSTWSpeed through waterkn
SetSetCurrent direction (towards)°T
DriftDriftCurrent ratekn
CTSCTSCourse to steer°T
SOGSOGSpeed over groundkn

Source: Admiralty Manual of Navigation BR45 Ch.8

In short

Course-to-steer and speed-over-ground when a tidal stream sets across the track.

Learn the theory Marine Voyage Planning and Routing