RYA-THEORY-L1.3

Tidal streams and estimating position

RYA-THEORY-M1 · Day Skipper Theory · RYA-THEORY-M1-A Charts, position, tides, tidal streams, IRPCS, buoyage and pilotage — the foundation tier.

As well as rising and falling, the tide flows horizontally as a tidal stream that can set the boat well off her course, so the skipper must allow for it. This lesson covers tidal streams, leeway, and the estimated position that combines them.