Signalling & Communication
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TermDefinition
- Phonetic Alphabet, Signals & Communication Papa
Pronounced: pah-pah
The term for the letter P in the NATO Phonetic Alphabet.
- Flag / Pennant, Signals & Communication Code Flag Papa (P)

The International Maritime Signal Flag Papa.
Meaning
The Blue Peter.
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In harbour: All persons should report on board as the vessel is... - Phonetic Alphabet, Signals & Communication Phonetic Alphabet
The Phonetic Alphabet, also known as the International Radiotelephony Spelling Alphabet or NATO phonetic alphabet, is a standardised set of words...
More Details - Flag Semaphore, Signals & Communication Letter P (Flag Semaphore)

Flag semaphore indicating the letter P.
- Morse Code, Signals & Communication Letter P (Morse Code)
International Morse Code sequence representing the letter P.
- General Nautical Terminology, Signals & Communication Procedure Words
Standardised words or phrases used in marine radio communication to ensure clarity, reduce misunderstandings, and maintain efficient and safe...
More Details - Flag / Pennant, Signals & Communication Code Flag Quebec (Q)

The International Maritime Signal Flag Quebec.
Meaning
Quarantine Flag.
My vessel is healthy and I request free pratique. - Flag Semaphore, Signals & Communication Letter Q (Flag Semaphore)

Flag semaphore indicating the letter Q.
- Morse Code, Signals & Communication Letter Q (Morse Code)
International Morse Code sequence representing the letter Q.
- Phonetic Alphabet, Signals & Communication Quebec
Pronounced: keh-BECK
The term for the letter Q in the NATO Phonetic Alphabet.
- Flag / Pennant, Signals & Communication Code Flag Romeo (R)

The International Maritime Signal Flag Romeo.
Meaning
Distance (range) in nautical miles. Given using Numeral Pennants.
- Flag Semaphore Ready (Flag Semaphore)

The Ready (Flag Semaphore) signal shows the sender is ready to send a message. The same shape is also used for Space (Flag Semaphore) & Rest...
More Details - Flag Semaphore Ready to Recieve (Flag Semaphore)

The Ready to Recieve signal shows the sender that the recipient is ready to receive a message. This shape is displayed once the sender has...
More Details - Flag Semaphore Rest (Flag Semaphore)

When the sender is not actively sending messages, both flags are held by their side. The same shape is also used for Space (Flag Semaphore) &...
More Details - Flag Semaphore, Signals & Communication Letter R (Flag Semaphore)

Flag semaphore indicating the letter R.
- Morse Code, Signals & Communication Letter R (Morse Code)
International Morse Code sequence representing the letter R.
- Phonetic Alphabet, Signals & Communication Romeo
Pronounced: ROW-me-oh
The term for the letter R in the NATO Phonetic Alphabet.
- Flag / Pennant, Signals & Communication Code Flag Sierra (S)

The International Maritime Signal Flag Sierra.
Meaning
I am operating astern propulsion.
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If appended with a Numeral Pennant, Speed... - Flag / Pennant, Signals & Communication Second Substitute (ICS Flag)

Substitute or repeater flags allow messages with duplicate characters to be signalled without requiring multiple sets of flags.
- General Nautical Terminology, Safety, Signals & Communication Sécurité
A maritime safety message broadcast over radio to convey important but non-urgent navigational or weather-related information.
Sécurité is a...
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