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QCH
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May I taxi to ... (place)?
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Cleared to taxi to ... (place).
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Aeronautical Code signals
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QDF
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What is your D-Value at ... (position)?
What is the D-Value at ... (place or position) (at ... hours) for the ... millibar level?
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My D-Value at ... (position) at ... (figures and units) height above the 1013.2 millibars datum is ... (D-Value figures and units) ... (specify plus or minus).
The D-Value at ... (place or position) at ... hours for the ... millibar level is (D-Value figures and units) ... (specify plus or minus).
Note.- When the true altitude (radio altitude) is greater than the pressure altitude PS (Plus) is used and when it is less MS (Minus) is used.
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Aeronautical Code signals
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QCE
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When may I expect approach clearance?
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Expect approach clearance at ... hours.
No delay expected.
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Aeronautical Code signals
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QBN
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Are you flying between two layers of cloud?
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I am flying between two layers of cloud and at flight level/altitude ...
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Aeronautical Code signals
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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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QBO
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What is the nearest aerodrome at which flight under VFR is permissible and which would be suitable for my landing?
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Flying under VFR is permissible at ... (place) which would be suitable for your landing.
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Aeronautical Code signals
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QBP
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Are you flying in and out of cloud?
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I am flying in and out of cloud and at flight level/altitude ...
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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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QBT
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What is the runway visual range at ... (place)?
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The runway visual range at ... (place) at ... hours is ... (distance figures and units).
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Aeronautical Code signals
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