initial call-up

Also found in: Medical.

initial contact

The initial voice contact between a facility and an aircraft, using the identification of the receiving unit and the unit initiating the call. Also called initial call-up.
References in periodicals archive ?
September call-ups: The Dodgers' return home Friday coincides with rosters expanding from 25 to 40, but because the Triple-A Albuquerque Dukes are heading to the playoffs, the initial call-ups will be minimal.
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