Glossary
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TermDefinition
- General Nautical Terminology, Navigation Small Vessel Electronic Chart Systems (SV-ECS)
Electronic navigation standards for commercial vessels less than 24m .
Equipment meeting the requirements of this performance standard is...
More Details - General Nautical Terminology, Signals & Communication SMCP
A set of internationally agreed-upon phrases used to ensure clear, concise, and unambiguous communication at sea, particularly between vessels...
More Details - General Nautical Terminology SnatchJerk caused by too short an anchor cable in a seaway; To take a turn quickly around a cleat, bollard or Samson post
- General Nautical Terminology Snug Down
Preparing a vessel and its equipment for heavy weather or secure rest.
This normally involves securing loose gear, reducing exposed canvas,...
More Details - General Nautical Terminology, Navigation SOG
The actual velocity of a vessel relative to the Earth's surface, accounting for the effects of currents, tides, and other environmental...
More Details - General Nautical Terminology SOLAS
An international maritime treaty that sets minimum safety standards for ship construction, equipment, and operation. Its primary goal is to...
More Details - General Nautical Terminology, Safety SOLAS V
Chapter V of SOLAS (Safety of life at Sea) refers to the Safety of Navigation for all vessels at sea.
SOLAS V for pleasure craft
SOLAS V...
More Details - General Nautical Terminology Sole
Sea area of the Met Office Shipping Forecast. Covers Sole Bank in the eastern Bay of Biscay off the French coast.
From the Sole Bank, famed...
More Details - General Nautical Terminology, Parts of a Boat Sole boards
The flat, horizontal planks or panels that form the flooring of a boat's interior, typically installed over the bilge area to provide a stable...
More Details - General Nautical Terminology, Morse Code, Safety, Signals & Communication SOS
The universally recognised distress signal used in maritime communication to indicate an emergency requiring immediate assistance.
The German...
More Details - General Nautical Terminology Sound
A relatively narrow body of water that connects two larger bodies of water or separates a mainland from an island.
A sound is a geographical...
More Details - General Nautical Terminology Sounding
The measurement of the depth of water, typically using a lead line or modern electronic equipment.
Sounding is a traditional maritime practice...
More Details - General Nautical Terminology, Weather (Meteorology) Southeast Iceland
Sea area of the Met Office Shipping Forecast. Located southeast of Iceland in the North Atlantic.
Southeast Iceland covers waters renamed from...
More Details - General Nautical Terminology, Weather (Meteorology) South Utsire
Sea area of the Met Office Shipping Forecast. Situated in the North Sea, south of Utsira Island off the west coast of Norway.
Also named for...
More Details - General Nautical Terminology Sou’westerA waterproof oilskin hat with a broad brim
- Flag Semaphore Space (Flag Semaphore)

This shape indicates a space, usually between words. The same shape is also used for Rest (Flag Semaphore) & Ready (Flag Semaphore).
More Details - General Nautical Terminology Spar
Any long, sturdy pole or beam used on a ship to support sails, rigging, or other equipment. Spars are typically made of wood, metal, or composite...
More Details - General Nautical Terminology Speed Made Good
The speed achieved along the intended track over the ground.
This accounts for the effect of tide, leeway and the vessel’s actual movement...
More Details - General Nautical Terminology, Navigation Speed Over Ground (SOG)
The actual velocity of a vessel relative to the Earth's surface, accounting for the effects of currents, tides, and other environmental...
More Details - General Nautical Terminology, Navigation Speed Through Water (STW)
The velocity at which a vessel moves relative to the water it is travelling through, excluding the effects of current or tidal flow.
Speed...
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