|Since ancient times, sailors try to communicate with flags between ships, but we have to wait until 1738 to see the first digital flag coding created by the French captain Mahé de la Bourdonnais.
In 1790, Lord Richard Howe, from the British Royal Navy, propose The "Howe Code", made with ten coloured flags, six special flags for control characters and a dictionnary of 260 digital entries.
In 1803, the admiral sir Home Popham publish his "Telegraphic Signals" or "Marine Vocabulary". This directory include somes 3000 digital signals corresponding to words, expressions and entire sentences. From 1803 to 1812, Popham extend the signal flags system with a new set of digital flags.
|The actual international marine flags signals coding date from 1934, It's used by vessels to send small messages, any flag gets its own alphabetical or digital meaning , but it's rather used as specific meaning, one by one or in group.|
|1. Alphabetical Signals
2. Digital Signals
3. Substitution Signals
4. Answer Signal
5. Two Flags Signals
Alpha + Charlie : I am abandoning my vessel.