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QSY
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Shall I change to transmission on another frequency?
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Change to transmission on another frequency (or on ... kHz (or MHz)).
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Amateur Radio
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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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QTA
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Shall I cancel telegram (or message) number ... ?
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Cancel telegram (or message) number ...
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All services
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QTA
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Shall I cancel telegram (message) No. ... as if it had not been sent?
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Cancel telegram (message) No. ... as if it had not been sent.
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Amateur Radio
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QBJ
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What is the amount, type and height above ... (datum) of the top of the cloud [at ... (position or zone)]?
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At ... hours at ... (position or zone) the top of the cloud is:
amount ... eights (... type) at ... (figures and units) height above ... (datum).
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Aeronautical Code signals
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QMW
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At ... (position or zone) what is (are) the flight level(s)/altitude(s) ... of the zero Celsius isotherm(s)?
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At ... (position or zone) the zero Celsius isotherm(s) is (are) at flight level(s)/altitude(s) ...
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Aeronautical Code signals
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QMX
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What is the air temperature [at ... (position or zone)] (at ... hours) at flight level/altitude ...?
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At ... (position or zone) at ... hours the air temperature is ... (degrees and units) at flight level/altitude …
Note.- Aircraft reporting QMX information will transmit the temperature figures as corrected for airspeed.
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Aeronautical Code signals
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QFC
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What is the amount, the type and the height above ... (datum) of the base of the cloud at ... (place, position or zone)?
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At ... (place, position or zone) the base of the cloud is ... eighths ... type at ... (figures and units) height above ... (datum).
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Aeronautical Code signals
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QFF
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[At ... (place)] what is the present atmospheric pressure converted to mean sea level in accordance with meteorological practice?
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At ... (place) the atmospheric pressure converted to mean sea level in accordance with meteorological practice is (or was determined at ... hours to be) ... millibars.
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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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