Glossary
-
TermDefinition
- General Nautical Terminology National Oceanic and Atmospheric Administration (NOAA)
The National Oceanic and Atmospheric Administration is an American scientific agency within the United States Department of Commerce that focuses...
More Details - Organisation NATO
An intergovernmental military alliance established in 1949 aimed to ensure the collective defence of its member state through political and...
More Details - General Nautical Terminology Nautical Almanac
A comprehensive publication containing astronomical data and navigational information essential for maritime navigation.
A Nautical Almanac is...
More Details - General Nautical Terminology, Navigation Nautical Mile
A nautical mile is a unit of measurement used in maritime navigation that is equivalent to one minute of latitude or approximately 1.852...
More Details - General Nautical Terminology, Navigation Navigational Telex (NAVTEX)
A maritime communication system used for the automatic broadcast of navigational and meteorological warnings, forecasts, and urgent safety...
More Details - General Nautical Terminology Navigation Lights
A system of coloured and white lights displayed on a vessel to indicate its position, heading, and status to other vessels, especially during low...
More Details - General Nautical Terminology, Navigation NAVTEX
A maritime communication system used for the automatic broadcast of navigational and meteorological warnings, forecasts, and urgent safety...
More Details - Flag / Pennant, Signals & Communication Code Flag November (N)

The International Maritime Signal Flag November.
Meaning
Negative.
- General Nautical Terminology NDB
A radio transmitter at a fixed location that emits signals in all directions, used in marine navigation to help vessels determine their position...
More Details - General Nautical Terminology Neap RangeThe difference in height between HW and LW on a Mean (average) neap tide.
- General Nautical Terminology, Navigation Neap Tide
When the difference between high and low water is at its smallest, typically occurring twice a month during the first and third quarters of the...
More Details - Weather (Meteorology) Near Gale
Sometimes used to describe wind strength approaching a Gale.
- Organisation NLB
The Northern Lighthouse Board is a maritime organisation responsible for maintaining lighthouses and navigation aids in Scotland and the Isle of...
More Details - Flag Semaphore, Signals & Communication Letter N (Flag Semaphore)

Flag semaphore indicating the letter N.
- Morse Code, Signals & Communication Letter N (Morse Code)
International Morse Code sequence representing the letter N.
- General Nautical Terminology, Navigation NM
A Notice to Mariners is an official publication issued by maritime authorities to provide important information and updates regarding...
More Details - General Nautical Terminology NOAA
The National Oceanic and Atmospheric Administration is an American scientific agency within the United States Department of Commerce that focuses...
More Details - General Nautical Terminology Non-Directional Beacon (NDB)
A radio transmitter at a fixed location that emits signals in all directions, used in marine navigation to help vessels determine their position...
More Details - Organisation North Atlantic Treaty Organization (NATO)
An intergovernmental military alliance established in 1949 aimed to ensure the collective defence of its member state through political and...
More Details - Organisation Northern Lighthouse Board (NLB)
The Northern Lighthouse Board is a maritime organisation responsible for maintaining lighthouses and navigation aids in Scotland and the Isle of...
More Details - General Nautical Terminology, Weather (Meteorology) North Utsire
Sea area of the Met Office Shipping Forecast. Located in the northern North Sea, adjacent to Utsira Island off the west coast of Norway.
Derived...
More Details - General Nautical Terminology, Navigation Notice to Mariners (NM)
A Notice to Mariners is an official publication issued by maritime authorities to provide important information and updates regarding...
More Details - Abbreviation, General Nautical Terminology Not Under Command (NUC)
A ship that, due to exceptional circumstances, is unable to manoeuvre as required by the International Regulations for Preventing Collisions at...
More Details - Phonetic Alphabet, Signals & Communication November
Pronounced: no-VEM-ber
The term for the letter N in the NATO Phonetic Alphabet.
- Abbreviation, General Nautical Terminology NUC
A ship that, due to exceptional circumstances, is unable to manoeuvre as required by the International Regulations for Preventing Collisions at...
More Details - Flag / Pennant, Signals & Communication Numeral 4 (Flag Pennant)

The flag represents the numerical value of four.
- Flag / Pennant, Signals & Communication Numeral 5 (Flag Pennant)

The flag represents the numerical value of five.
- Flag / Pennant, Signals & Communication Numeral 6 (Flag Pennant)

The flag represents the numerical value of six.
- Flag / Pennant, Signals & Communication Numeral 7 (Flag Pennant)

The flag represents the numerical value of seven.
- Flag / Pennant, Signals & Communication Numeral 8 (Flag Pennant)

The flag represents the numerical value of eight.
- Flag / Pennant, Signals & Communication Numeral 9 (Flag Pennant)

The flag represents the numerical value of nine.
- Flag / Pennant, General Nautical Terminology, Signals & Communication Numeral Pennant
A triangular flag used in maritime signalling to represent numerical digits, typically in conjunction with other signal flags.
A numeral...
More Details - Flag Semaphore, Signals & Communication Numerals-Numbers Follow (Flag Semaphore)

This flag semaphore signal indicates a change from letters to numbers (Numbers Follow), indicating that the signaller will be using the...
More Details

