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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 International Code is the most ...
International maritime 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, or have historical ...
Diver down flag. A diver down flag, or scuba flag, is a flag used on the water to indicate that there is a diver below. Two styles of flag are in use. Internationally, the code flag alfa/alpha, which is white and blue, is used to signal that the vessel has a diver down and other vessels should keep well clear at slow speed.
A US Navy crewman signals the letter 'U' using flag semaphore during an underway replenishment exercise (2005). Flag semaphore (from the Ancient Greek σῆμα (sêma) 'sign' and - φέρω (-phero) '-bearer' [1]) is a semaphore system conveying information at a distance by means of visual signals with hand-held flags, rods, disks, paddles, or occasionally bare or gloved hands.
Naval flag signalling undoubtedly developed in antiquity in order to coordinate naval action of multiple vessels. In the Peloponnesian War (431 – 401 BCE) squadrons of Athenian galleys were described by Thucydides as engaging in coordinated maneuvers which would have required some kind of communication; [1] there is no record of how such communication was done but flags would have been the ...
Maritime flag signalling. Maritime flag signalling, generally flaghoist signalling, is the principal means other than radio by which ships communicate to each other or to shore (distinguished from flags showing nationality, ownership, or (for naval vessels) organizational status). Virtually all signalling by non-naval vessels is now organized ...
The Swiss road signs are defined in the Road Signs Act, which is based on several laws and ordinances.Liechtenstein largely follows the legislation of Switzerland. The principal law for road signs in Switzerland is the Road Signs Act (German: Signalisationsverordnung (SSV), French: Ordonnance du sur la signalisation routière (OSR), Italian: Ordinanza sulla segnaletica stradale (OSStr)). [3]
Road signs in Ornans.. Road signs in France refer to all conventional signals installed on French roads and intended to ensure the safety of road users, either by informing them of the dangers and regulations relating to traffic as well as elements useful for decision-making, or by indicating to them the landmarks and equipment useful for their travel on the national territory.