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TermDefinition
- Sector Light Occasionally a light may not be visible through 360 degrees, or it may shine different colours depending on where it is viewed from. In this(...) Read more
- SecuriteAn internationally recognised safety signal used on the radio telephone preceding an important navigational or meteorological warning Read more
- Semi-Displacement VesselA semi-displacement hull combines the features of a planing vessel along with a displacement hull. The vessel will rise at the bow as she(...) Read more
- SendVertical movement of waves or swell against, for example, a harbour wall Read more
- Set To hoist or trim a sail; The direction to which a tidal stream or current flows; To Set Sail. Read more
- Set Sail To start out on a voyage. Read more
- ShackleA metal link for connecting ropes, wires or chains to sails, anchors, etc. Read more
- ShaftdriveMany sailing vessels and most motor cruisers will have a shaftdrive transmission system. A shaft runs from the gearbox, through the hull beneath(...) Read more
- Day Shape A ball, cone or diamond-shaped object, ordinarily black, hoisted by day on a vessel to indicate a particular status within the IRPCS. If(...) Read more
- SheetRope or line fastened to the clew of a sail or the end of the boom supporting it. Named after the sail to which it is attached Read more
- Sheets Lines used to control sail shape. Read more
- Shipping ForecastWeather forecast broadcast four times each day by the British Broadcasting Corporation (BBC) for the benefit of those at sea Read more
- Shipping LaneA busy track across the sea or ocean Read more
- ShipshapeNeat and efficient Read more
- ShoalAn area offshore where the water is to shallow that a vessel might run aground. To shoal is to become shallow Read more
- Shock CordElastic rubber bands enclosed in a sheath of fibres, very useful for lashing Read more
- Shorten SailTo reduce the amount of sail set either by reefing or changing to make a smaller sail Read more
- ShroudParts of the standing rigging that supports the mast laterally Read more
- Side DeckThe deck alongside the coachroof Read more
- Phonetic Alphabet Sierra Phonetic alphabet letter S. Astern Propulsion: When a vessel displays the Sierra flag, it indicates that the vessel is moving in reverse,(...) Read more