Glossary
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TermDefinition
- 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, 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 - General Nautical Terminology Not Under CommandVessel broken down. No steerage, engines defunct etc.
- Phonetic Alphabet, Signals & Communication November
Pronounced: no-VEM-ber
The term for the letter N in the NATO Phonetic Alphabet.
- 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 - Abbreviation, Light Characteristic Oc
A light with more light than dark (is on for longer than it is off).
Occulting refers to a type of navigational light in which the light is...
More Details - Abbreviation, Light Characteristic Occulting (Oc)
A light with more light than dark (is on for longer than it is off).
Occulting refers to a type of navigational light in which the light is...
More Details - General Nautical Terminology Ocean Data Acquisition System (ODAS)
The Ocean Data Acquisition System (ODAS) is a system used to collect, process, and transmit various types of oceanographic data. This system...
More Details - Flag / Pennant, Signals & Communication Code Flag Oscar (O)
The International Maritime Signal Flag Oscar.
Meaning
Man overboard. (Often attached to the Danbuoy pole on boats.)
The semaphore flag.