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TermDefinition
- FairAdvantageous or favourable, as of wind or tidal stream; In weather meaning no significant precipitation Read more
- FairleadA ring, hook or other device used to keep a line or chain running in the correct direction or to prevent it rubbing or fouling. Read more
- FairwayThe main channel in a body of water such as an estuary or river Read more
- Fairway MarkBuoy, post or pillar positioned at safe distance to seaward of a channel. See also Safe Water mark. Read more
- Fathom A nautical unit of measurement that is equal to six feet. Read more
- Fender A fender is a cushioning device used on boats and ships to prevent damage to the vessel or dock when they come into contact, particularly when(...) Read more
- FetchThe distance travelled by the wind when crossing open water. The height of the waves is proportional to the fetch and strength of the wind Read more
- FidA tapered tool used for separating the strands of rope for splicing. Read more
- FixThe position of a vessel as plotted on the chart from position lines obtained by compass bearings, direction finder, echo sounder etc. Read more
- FlaresFlares are pyrotechnics and one of the most effective means of signalling distress and marking your position. There are several types of flare(...) Read more
- Flashing LightA light where there is more darkness than light Read more
- FloodThe period when the tidal level is rising Read more
- FlukeThe wedge-shaped part of an anchor's arms that digs into the bottom. Read more
- Flying Out A sail is flying out in a breeze when it has no tension in the sheets Read more
- Fo'c'sleThe part of the accommodation below the foredeck and forward of the mast Read more
- FogVisibility reduced to less than 1000 metres (approximately 0.5 nautical miles) Read more
- FoghornFog horns are used for sounding the appropriate sound signal whilst in restricted visibility Read more
- Folding PropellerA propeller with folding blades, furling to reduce drag on a sailing vessel when not in use Read more
- Following SeaSeas that are moving in the same direction as the vessel is heading Read more
- FootThe foot is the bottom edge of the sail. The foot is attached at either end by the tack and clew. The mainsail foot may also run through a(...) Read more