Aircraft Warning System:
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Passes, A single-rotor aircraft starts up
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Passenger plane takes off
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Passenger airplane in flight
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A single-rotor aircraft starts, takes off
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A twin-screw plane travels slowly,
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Single-rotor aircraft lands
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Single-rotor aircraft lands (plane,landing)
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Switches in the cockpit of a passenger
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Turboprop aircraft in flight
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Single-rotor aircraft in flight
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The noise of the receiver in the cockpit
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Airplane span high in the sky
★★★★★