塔台：“东航702，起飞批准，请用124.7联系离场控制空管。”
Tower: "Eastern 702, cleared for takeoff, contact Departure on frequency 124.7."
塔台：“大陆航空635，起飞批准，请用124.”7联系离场控制空管。
Tower: "Continental 635, cleared for takeoff, contact Departure on frequency 124.7."
离场控制，给用仪表飞行规则离场，和在某种情况下用目视飞行规则离场的飞机提供空中交通管制服务的进近管制设施的一种功能。
DEPARTURE control, a function of an approach control facility providing air traffic control service for departing IFR and, under certain conditions, VFR aircraft.
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