Tool to decrypt/encrypt with flags automatically. International Maritime/Navy signals code is a code substituting flags to letters.
Navy Signals Code - dCode
Tag(s) : Communication System, Symbol Substitution
dCode is free and its tools are a valuable help in games, maths, geocaching, puzzles and problems to solve every day!
A suggestion ? a feedback ? a bug ? an idea ? Write to dCode!
The ciphered message is made of flags (squared) in basic colors: blue, white, yellow, red, black (no green and no compound colors) offering a large contrast.
Flags used in navy, do not necessarily mean a distress signal, they can handle a radio problem and help ship navigation.
All references to the navy, naval forces (Royal Navy, US Navy etc.) and ships in general are clues.
NATO uses 10 other flags to code digits.
The French reference book is available here (link)