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Terms for subject Aviation (1801 entries)

"Negative"	An expression used in radiocommunication meaning "No," "Permission not granted," or "That is not correct."
"on-course" indication	An indication on an instrument that provides the pilot with a visual means of determining that the aircraft is located on the centreline of a given navigational track, or an indication on a radar scope that an aircraft is on a given track
"Orbit"	An expression used by controllers when issuing an instruction to hold
"Out"	An expression used in radiocommunication meaning "This exchange of transmissions is ended and no response is expected."
"Over"	An expression used in radiocommunication meaning "My transmission is ended, and I expect a response from you."
"PAN PAN"	The international radiotelephony urgency signal. Preferably spoken three times, it indicates a condition that concerns the safety of an aircraft or another vehicle, or of some person on board or within sight, but that does not require immediate assistance.
"Pull up and go around"	An instruction given to the pilot by ATC when, in the controller's judgment, the aircraft landing procedure cannot safely be continued to touchdown
"Radar contact"	An expression used by ATC to inform the pilot of an aircraft when radar identification is established
"Radar identified"	An expression used by ATC to inform the pilot of an aircraft when radar identification is established
"Radar service terminated"	An expression used by ATC to inform a pilot that he or she will no longer be provided with any of the services that could be received while in radar contact
"Read back"	An expression used in radiocommunication meaning "Repeat all, or the specified part, of this message back to me exactly as received."
"Recleared"	An expression used in radiocommunication meaning "A change has been made to your last clearance and this new clearance supersedes your previous clearance or part thereof."
"Resume normal navigation"	An expression used by ATC to advise a pilot to resume his or her own navigational responsibility. It is issued after completion of a vector or when radar contact is lost while the aircraft is being vectored.
"Resume normal speed"	An expression used by ATC to advise a pilot that previously issued speed restrictions are cancelled, but that published speed restrictions are still applicable, unless otherwise stated by ATC
"Resume own navigation"	An expression used by ATC to advise a pilot to resume his or her own navigational responsibility. It is issued after completion of a vector or when radar contact is lost while the aircraft is being vectored.
"Roger"	An expression used in radiocommunication meaning "I have received all of your last transmission."
"Say again"	An expression used to request a repetition of the last transmission
"Say altitude"	An expression used by ATC to ascertain an aircraft's specific altitude or flight level
"Squawk ident"	A request for a pilot to activate the aircraft transponder identification feature
"Standby"	An expression used in radiocommunication meaning "Wait and I will call you."