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QNR
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I am approaching my point of no return.
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Aeronautical Code signals
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QSI
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I have been unable to break in on your transmission.
Will you inform ... (call sign) that I have been unable to break in on his transmission (on ... kHz (or MHz)).
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All services
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QCF
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Delay indefinite. Expect approach clearance not later than ... hours.
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Aeronautical Code signals
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QBS
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Ascend (or descend) to ... (figures and units) height above ... (datum) before encountering instrument meteorological conditions or if visibility falls below ... (distance figures and units) and advise.
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Aeronautical Code signals
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QCB
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Delay is being caused by …
1) your transmitting out of turn.
2) your slowness in answering.
3) lack of your reply to my …
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Aeronautical Code signals
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QDU
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Cancelling my IFR flight.
IFR flight cancelled at ... (time).
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Aeronautical Code signals
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QCY
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I am working on a trailing aerial.
Work on a trailing aerial.
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Aeronautical Code signals
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QCS
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My reception on ... frequency has broken down.
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Aeronautical Code signals
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QCI
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Make a 360-degree turn immediately (turning to the ...).
I am making a 360-degree turn immediately (turning to the ...).
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Aeronautical Code signals
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