Glossary
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TermDefinition
- Flag Semaphore, Signals & Communication Letter L (Flag Semaphore)
Flag semaphore indicating the letter L.
- Morse Code, Signals & Communication Letter L (Morse Code)
International Morse Code sequence representing the letter L.
- General Nautical Terminology LNM
A Local Notice to Mariners (LNM) is a publication issued by maritime authorities to provide important information to mariners about navigational...
More Details - General Nautical Terminology Local Notice to Mariners (LNM)
A Local Notice to Mariners (LNM) is a publication issued by maritime authorities to provide important information to mariners about navigational...
More Details - General Nautical Terminology LockA chamber with gates at each end in which the water level can be raised or lowered
- General Nautical Terminology LockerAn enclosed stowage anywhere on board
- General Nautical Terminology Log
A log is a detailed record kept by a vessel's crew that documents the ship's course, speed, weather conditions, and other important navigational...
More Details - General Nautical Terminology LogbookA book to keep a record of events, distance run and courses, etc.
- General Nautical Terminology Log Line
A device used historically by mariners to measure a vessel's speed through the water.
The log line consists of a wooden board, known as the...
More Details - General Nautical Terminology Log ReadingThe reading of distance travelled through the water usually taken every hour from the log and recorded in the deck log
- General Nautical Terminology, Navigation Longitude
Longitude is the geographic coordinate that specifies the east-west position of a point on the Earth's surface, measured in degrees(°),...
More Details - General Nautical Terminology Look-outVisual watch; Member of the crew responsible for keeping it
- General Nautical Terminology Lose WayA vessel loses way when she slows down and stops in the water
- General Nautical Terminology, Navigation Lowest Astronomical Tide (LAT)
The lowest level that sea tides can reach under normal meteorological conditions, based on astronomical influences such as the gravitational pull...
More Details - General Nautical Terminology Lubber LineThe marker in the compass which is aligned with the fore-and-aft line of the boat against which the course can be read off on the compass card
- General Nautical Terminology Luff
The luff of a sail refers to the leading edge, which is the part of the sail that faces the wind when the sail is set correctly.
The luff of a...
More Details - General Nautical Terminology Luff UpTo steer a sailing vessel more towards the direction of the wind
- General Nautical Terminology LullA temporary drop in wind speed
- General Nautical Terminology Magnetic North
Magnetic North refers to the direction indicated by a magnetic compass, which points towards the Earth’s magnetic north pole. This differs from...
More Details - Organisation MAIB
A UK government agency responsible for investigating marine accidents and incidents to improve maritime safety. Part of the Department for...
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