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Two sailing ships dressed overall with their signal flags. 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 ...
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.
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 ...
The International Code of Signals [1] defines a standard set of flags and associated alphabet suitable for international use, as well as a set of standard codes. Flaghoist is also used in boat racing , to warn of impending severe weather, and other specialized applications.
The Red Ensign, as currently used by the United Kingdom's Merchant Navy. The ensign is the national identification of a ship and hoisted up in a national flag world-wide. . They are required to be worn when entering and leaving harbour, when sailing through foreign waters, and when the ship is signalled to do so by a war
The Z flag is a diagonally quartered square consisting of four isosceles triangles with their apexes meeting in the center of the square – a yellow triangle on the top, blue at the fly (right), red on the bottom, black at the hoist (left). It is the only flag in the international maritime flag set to use four colors.
Boat Type Class Marking Marking description Mirror: Red Italic Capital letter M on a crescent section of a circle Redwing: 18. White Number on a dark red sail
In international maritime signal flags, plain yellow, green, and black flags have been used to symbolize disease in ships and ports. The color yellow has a longer history. It was used to mark houses of infection prior to its maritime use. Yellow jack also became a name for yellow fever. Cholera-infected ships also used a yellow flag. [1]