call sign

n. code (letters or numbers) of radio or television transmitting station (allocated by a controlling body); series of letters and numbers that identify a vessel(unique to each ship)

In broadcasting and radio communications, a call sign (also known as a callsign or call letters, or abbreviated as a call) is a unique designation for a transmitting station. In some countries they are used as names for broadcasting stations, but in many other countries they are not. A call sign can be formally assigned by a government agency, informally adopted by individuals or organizations, or even cryptographically encoded to disguise a station's identity.
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A station or address designator represented by a combination of characters or pronounceable words that is used to identify such entities as a communications facility, station, command, authority, activity, or unit.

Any combination of characters or pronounceable words, which identifies a communication facility, a command, an authority, an activity, or a unit; used primarily for establishing and maintaining communications. See also collective call sign; indefinite call sign; international call sign; net call sign; tactical call sign; visual call sign; voice call sign. 1/3/73

Toute combinaison de caractères ou mots prononçables servant à identifier une ou plusieurs stations de transmissions, commandements, autorités, organismes ou unités; est utilisée pour l'établissement et le maintien des communications. Voir aussi indicatif d'appel collectif; indicatif d'appel de réseau; indicatif d'appel indéfini; indicatif d'appel international; indicatif d'appel phonie; indicatif d'appel tactique; indicatif d'appel visuel. 1/3/73

call-sign /'kɔlsain/
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