The International Code of Signals (ICS) is an international system of signals and codes for use by vessels to communicate important messages regarding safety of navigation and related matters. Signals can be sent by flag hoist, signal lamp (“blinker”), flag semaphore, radiotelegraphy, and radiotelephony.
The purpose of the International Code of Signals is to provide ways and means of communication in situations related essentially to safety of navigation and persons, especially when language difficulties arise. It has done this by first establishing a standardized alphabet (the letters A to Z and the ten digits), along with a spoken form of each letter (to avoid confusing similar sounding letters, such as ‘b’, ‘p’, and ‘v’), and associating this alphabet with standardized flags.
Interco is published by her majesties stationery office-london The book used for this synopsis is: edition 1969
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