TeachMeFinance.com - explain international call sign
international call sign 'international call sign' is an military term. It means '(DOD,NATO) A call sign assigned in accordance with the provisions of the International Telecommunications Union to identify a radio station. The nationality of the radio station is identified by the first or the first two characters. (When used in visual signaling, international call signs are referred to as "signal letters.") See also call sign'.
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