call sign

(redirected from Callsign)
Also found in: Dictionary.

call sign

[′kȯl ‚sīn]

Call Sign


a set of characters (code symbols, letters, or numbers) or an audible signal (word, musical phrase, bird call) that serves as the distinctive sign of a radio station—usually for the purpose of identification of the station during reception. As a rule, it is transmitted at the beginning of each period of the station’s operation.

The set of symbols in a call sign identifies the station’s national affiliation. The initial characters are established by the International Radio Regulations. The USSR, for example, uses in this position the letters U and R and such combinations as 4J, 4K, and 4L. The complete structure of a call sign depends on the class (purpose) of a station and differs for broadcasting, official, and amateur radio stations. Call signs for amateur radio stations have a complicated makeup and contain the most information. They often indicate through a code the station’s operating wave band (shortwave or ultrashortwave), the station’s group (a collective or individual station) and site (in the USSR—the Union republic, oblast, and amateur-radio region), and the individual letter symbol or registration number of the station.


call sign

Any combination of characters or pronounceable words used primarily for establishing and maintaining communications. It identifies a communication facility, a command, an authority, an activity, or a unit. A call sign should have at least two syllables (e.g., Red 1, Pan Am 550).
References in periodicals archive ?
Annual rate of callsign confusion events resulting from recognition errors between pilots and ATC was 4.
Callsign confusion events: (leading to recognition errors between pilots & ATC)
NAV CANADA's Code Callsign Distribution System Replacement (CCDS-R) matches the "Squawk" code transmitted by aircraft with their filed flight plan.
One controller, callsign Manilla 34, said he warned the pilots they were near "friendly forces" before they opened fire.
161 Recce Flight deployed to Bien Hoa in 1965 and its Possum callsign was heard in the crowded skies until Australian operations ceased in 1972.
The editor was a Major with combat experience in WWII and Korea who used his callsign, Old TAT (Tired-A ** Tiger).
I've known many a brownshoe what earned the callsign "Boom Boom" over the aeons I've been associating with air machines.
Group Captain Paul Oborn, Station Commander of RAF Lyneham where eight of the RAF servicemen who died were based, praised all those killed saying: "On the 30 January, 2005 the Iraqi people gained their freedom ( just as the crew and all on board the Royal Air Force Hercules, callsign Hilton 22, lost theirs in a marshy field some 40 miles north-west of Baghdad.
IF you get the chance to listen to the cockpit speakers, listen out for the aircraft callsign.
Callsign 69 set up inside the wire and consisted of the Platoon Commander and one sniper equipped with a nightscope.
The callsign of Serbia's national carrier is set to remain "JAT" while its IATA designator is to remain "JU".
Our detachment got a relatively benign complacency check, and I likely earned a callsign.