Glossary
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TermDefinition
- General Nautical Terminology Gaff
A spar attached to a mast, used to support the upper edge of a fore-and-aft sail, such as a gaff rigged mainsail or topsail.
A gaff is an...
More Details - General Nautical Terminology Gaff Rig
A sailing rig where the sail is four-sided and controlled by a spar (the gaff) at its top, which is hoisted at an angle to the mast.
A gaff...
More Details - Weather (Meteorology) Gale
Beaufort Scale - Force 8 (Gale Force 8)
A gale refers to a strong wind between 34 to 40 knots (39 to 46 mph or 63 to 74 km/h) on the Beaufort...
More Details - General Nautical Terminology, Parts of a Boat Galley
The kitchen or cooking area on a ship or boat, typically compact and designed for efficient use of space.
Unlike a kitchen in a house, the...
More Details - Flag / Pennant, Signals & Communication Code Flag Golf (G)

The International Maritime Signal Flag Golf.
Meaning
I require a pilot.
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By fishing vessels: I am hauling nets.
If appended by a Numeral... - General Nautical Terminology GDOP
A measure in marine navigation that quantifies the effect of satellite geometry on the accuracy of position determination. It is a factor used to...
More Details - General Nautical Terminology, Parts of a Boat Gelcoat
A specialised resin-based coating applied to the surface of fibreglass boats to provide a smooth, durable, and protective outer layer.
Gelcoat...
More Details - Organisation General Lighthouse Authorities (GLA)
A term that collectively refers to the three organisations responsible for maintaining maritime navigation aids—such as lighthouses, buoys, and...
More Details - General Nautical Terminology Genoa
A large foresail that overlaps the mainsail, commonly used on sailing yachts to improve speed and performance in light to moderate winds.
A...
More Details - General Nautical Terminology Geometric Dilution of Precision (GDOP)
A measure in marine navigation that quantifies the effect of satellite geometry on the accuracy of position determination. It is a factor used to...
More Details - General Nautical Terminology, Weather (Meteorology) German Bight
Sea area of the Met Office Shipping Forecast. Located in the southeastern North Sea, off the coast of northern Germany and the...
More Details - General Nautical Terminology, Weather (Meteorology) GFS
A weather model developed by the National Centers for Environmental Prediction (NCEP) that provides global weather forecasts by simulating the...
More Details - General Nautical Terminology Gimbal
A pivoted support that allows an object, such as a compass or a stove, to remain level regardless of the motion of the vessel.
A gimbal is a...
More Details - General Nautical Terminology Give Way
In a collision situation, one or more vessels are defined as Give Way. The Give Way vessel should alter its course to concede passage to another...
More Details - General Nautical Terminology Give Way VesselThe vessel whose duty it is to keep clear of another, she should take early and substantial action to avoid a collision
- Organisation GLA
A term that collectively refers to the three organisations responsible for maintaining maritime navigation aids—such as lighthouses, buoys, and...
More Details - General Nautical Terminology Glass Reinforced Plastic (GRP)
A composite material made of a polymer matrix reinforced with fine glass fibres, commonly used in marine applications for its strength,...
More Details - Flag Semaphore, Signals & Communication Letter G (Flag Semaphore)

This shape represents the Letter G (Flag Semaphore) and the Number 7 (Flag Semaphore).
- Morse Code, Signals & Communication Letter G (Morse Code)
International Morse Code sequence representing the letter G.
- General Nautical Terminology, Weather (Meteorology) Global Forecast System (GFS)
A weather model developed by the National Centers for Environmental Prediction (NCEP) that provides global weather forecasts by simulating the...
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