QCodes

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Code Question Answer Application
QDV Are you flying in a flight visibility of less than ... (figures and units)? I am flying in a flight visibility of less than ... (figures and units) at flight level/altitude ... Aeronautical Code signals
QBN Are you flying between two layers of cloud? I am flying between two layers of cloud and at flight level/altitude ... Aeronautical Code signals
QBH Are you flying below cloud? I am flying below cloud and at flight level/altitude … Maintain a vertical distance of ... (figures and units) below cloud. Aeronautical Code signals
QBG Are you flying above cloud? I am flying above cloud and at flight level/altitude … Maintain a vertical distance of ... (figures and units) above clouds, smoke, haze or fog levels. Aeronautical Code signals
QAZ Are you experiencing communication difficulties through flying in a storm? I am experiencing communication difficulties through flying in a storm. Aeronautical Code signals
QTZ* Are you continuing the search? I am continuing the search for ... (aircraft, ship, survival craft, survivors or wreckage). All services
QRL Are you busy? I am busy. (or I am busy with ... ) Please do not interfere. Amateur Radio
QRL Are you busy? I am busy (or I am busy with ...). Please do not interfere. All services
QRD Where are you bound for and where are you from? I am bound for ... from ... All services
QRM Are you being interfered with? [AP13] Is my transmission being interfered with? [AP14] I am being interfered with [AP13] Your transmission is being interfered with ... [AP14] (1. nil 2. slightly 3. moderately 4. severely 5. extremely). All services