In an aircraft，the ADF permits a pilot to _______ continuous bea

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• Before flight, pilots must have at least _______ hours rest time
• PAR is superior to ASR in that it can provide _______ .
• _______ radar service，the radar controller should inform the pil
• If an aircraft’s identification is lost before or during a hand-
• When an ASR procedure terminates at less than 2 miles from touch