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Discover Ludwig"call sign" is correct and commonly used in written English.
It refers to a unique combination of letters and numbers used to identify a specific person, vehicle, or location in communication, such as in radio broadcasts or military operations. Example: "Please provide your call sign before beginning your transmission," the radio operator instructed. The truck driver responded with his call sign, "This is Delta-Echo-Niner requesting permission to enter the loading dock."
Dictionary
call sign
noun
A combination of letters and numbers used to identify a radio or television station.
synonyms
Exact(58)
Her call sign was "Seagull".
Her call sign is "Mom".
Then he heard his brother's call sign.
His Holiness has his own call sign, too: volo papale.
In Iraq, his radio call sign was Chaos.
Treviño was known by his radio call sign: Cuarenta ("Forty").
Chesley B. Sullenberger III, flub the plane's call sign.
Will you change our call sign to SAM 27000?' Back came the reply: 'Roger, SAM 27000.
In 1963 the Chess brothers bought a radio station and gave it the call sign WVON.
Similar(2)
Sonderheimer confirmed, using the flight's call-sign: "Direct IRMAR, merci 18G".
The call-sign was engaged in a fierce firefight which saw most of its vehicles destroyed.
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com