Glossary
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TermDefinition
- General Nautical Terminology, Safety Global Maritime Distress and Safety System (GMDSS)
An internationally agreed-upon set of safety procedures, communication protocols, and equipment designed to ensure that ships at sea can send and...
More Details - Signals & Communication Global Maritime Distress and Safety System Sea Areas
A map of the UK indicating the 3 sea areas around the coast and the coast of nearby European countries. White pointers indicate Medium Frequency...
More Details - General Nautical Terminology, Navigation Global Navigation Satellite System (GNSS)
The collective set of systems that enables positioning devices to calculate latitude & longitude. The system includes solutions including the GPS...
More Details - General Nautical Terminology Global Positioning System (GPS)
The US-based system of satellites, able to determine the latitude and longitude of a receiver on Earth by calculating the time difference for...
More Details - General Nautical Terminology, Safety GMDSS
An internationally agreed-upon set of safety procedures, communication protocols, and equipment designed to ensure that ships at sea can send and...
More Details - General Nautical Terminology, Navigation GMT
The mean solar time at the Prime Meridian in Greenwich, London, used as a global time standard.
Greenwich Mean Time (GMT) is a timekeeping...
More Details - General Nautical Terminology, Navigation Gnomonic Projection
A type of map projection where the surface of the Earth is projected onto a plane from the centre of the globe, causing great circles to appear...
More Details - General Nautical Terminology, Navigation GNSS
The collective set of systems that enables positioning devices to calculate latitude & longitude. The system includes solutions including the GPS...
More Details - General Nautical Terminology Go About
Changing tack by turning the bow through the wind.
This manoeuvre brings the wind from one side of the vessel to the other, allowing progress...
More Details - General Nautical Terminology Going Astern
Moving backwards through the water under engine or controlled momentum.
This is usually done when leaving a berth, stopping a vessel, or...
More Details - Phonetic Alphabet, Signals & Communication Golf
Pronounced: GOLF
The term for the letter G in the NATO Phonetic Alphabet.
- General Nautical Terminology Gooseneck
A pivotal fitting on a sailing vessel that connects the boom to the mast, allowing for controlled movement in multiple directions.
The...
More Details - General Nautical Terminology Goose-winged
A sailing configuration where a fore-and-aft rigged vessel's sails are set on opposite sides of the boat, typically with the mainsail on one side...
More Details - General Nautical Terminology GPS
The US-based system of satellites, able to determine the latitude and longitude of a receiver on Earth by calculating the time difference for...
More Details - General Nautical Terminology, Safety Grab Bag
A portable, easily accessible bag containing essential safety and survival equipment needed in an emergency situation at sea.
A Grab Bag, also...
More Details - General Nautical Terminology Grab RailRails fitted above and below decks to grab at when the vessel heels
- General Nautical Terminology, Navigation Greenwich Mean Time (GMT)
The mean solar time at the Prime Meridian in Greenwich, London, used as a global time standard.
Greenwich Mean Time (GMT) is a timekeeping...
More Details - General Nautical Terminology, Weather (Meteorology) GRIB
A type of data format used in oceanography and meteorology to represent gridded data in a binary form for efficient storage and processing.
More Details - General Nautical Terminology, Weather (Meteorology) GRIdded Binary (GRIB)
A type of data format used in oceanography and meteorology to represent gridded data in a binary form for efficient storage and processing.
More Details - General Nautical Terminology GroundA general term for the anchors, cables and all the gear required when anchoring

