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International maritime signal flags are various flags used to communicate with ships. The principal system of flags and associated codes is the International Code of Signals. [1] Various navies have flag systems with additional flags and codes, and other flags are used in special uses, or have historical significance. [2]
The International Code of Signals (INTERCO) 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 flaghoist , signal lamp ("blinker"), flag semaphore , radiotelegraphy, and radiotelephony.
But they retain additional flags for naval usage (such as related to maneuvering or status), and use their own codes. E.g., in the ICS the single flag Mike means the vessel is stopped; in the U. S. Navy it means the duty medical officer is on board. Flaghoist was the only way ships could signal prior to the advent of radio and blinking light ...
The code numbers typically would have been hoisted on the mizzenmast, one after another, preceded by the "telegraphic flag" (a red over white diagonally-split flag) [10] to show that the subsequent signals would employ the Popham code. [11] As well as digit flags, the code used "repeat" flags so that only one set of digits was needed; thus the ...
Download QR code; Print/export Download as PDF; Printable version; ... International maritime signal flags; J. Jack (flag) Japanese Navy Signal Flags;
A designator flag is used to indicate if a flaghoist signal is meant to be interpreted as an ICS signal or as a naval signal. The U.S. Navy uses a set of 68 flags, including flags for each letter of the alphabet and each numeral to convey messages of tactical or administrative nature. [2] [better source needed]
The rank flag or distinguishing flag is the flag worn by a superior officer on their flagship or headquarters (hence the term flagship). The origins of this are from the era before radiotelegraphy and radiotelephony, when orders were given by flag signals. The flag denotes the ship which must be watched for signals designating orders. Such ...
Ireland - List of flags of Ireland § Naval service; Japan - List of Japanese flags § Self-Defense Force and Imperial Army/Navy; Latvia - List of Latvian flags § Military flags; Norway - List of Norwegian flags § Flags of the Navy; Poland - List of Polish naval and maritime flags, List of Polish flags § Navy; Russia - List of Russian navy flags