RYA-THEORY-L1.2

Tides and tidal heights

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

Tides raise and lower the sea by many metres in some places, deciding whether there is water under the keel, so calculating the height of tide is a core Day Skipper skill. This lesson covers why tides happen and how to work the height at a standard port.