| "Break" |
An expression used in radiocommunication meaning "I hereby indicate the separation between portions of the message." |
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| "Break" |
An expression used in radiocommunications to instruct a pilot to execute a rapid level turn |
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| "Cancel my IFR flight plan" |
An expression used by a pilot when flying on an IFR flight plan (FP) in the U.S. or landing at a Canadian airport that underlies airspace delegated to the control of the FAA, to discontinue providing IFR separation and close the FP. |
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| "Cancelling IFR" |
An expression used by a pilot, when flying on an IFR flight plan (FP) or flight itinerary (Fl) to change flight rules from IFR to VFR. As a result, ATC will discontinue providing IFR separation, but will not close the IFR FP or FI or open a VFR FP or FI. |
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| "Chaff burst" |
An expression used in radiocommunication to inform ATC of chaff drops at intervals short enough to appear on radar displays as an individual target |
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| "Clear of runway" |
In ground control, an expression indicating that a vehicle or an aircraft is at least 200 ft clear of the nearest edge of the runway in use, wherever practicable |
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| "Clearance cancelled ..." |
An expression used in radiocommunication to indicate a time specified by an ATC unit at which a clearance ceases to be valid unless the aircraft concerned has already taken action to comply therewith |
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| "Clearance valid ..." |
An expression used in radiocommunication to indicate a departure time restriction issued to a pilot by ATC (either directly or through an authorized relay) when it is necessary to separate a departing aircraft from other traffic |
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| "Clearance void ..." |
An expression used in radiocommunication to indicate a time specified by an ATC unit at which a clearance ceases to be valid unless the aircraft concerned has already taken action to comply therewith |
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| "Cleared as filed" |
An expression indicating that the aircraft is cleared to proceed in accordance with the route of flight filed in the flight plan (FP) This clearance does not include the altitude, standard instrument departure (SID) or SID transition. |
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| "Cleared for takeoff" |
An expression used to indicate ATC authorization for an aircraft to depart. It is predicated on known aircraft and known physical airport conditions. |
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| "Cleared for the option" |
For an arriving aircraft: An expression used to indicate ATC authorization for an aircraft to make a touch-and-go, low approach, missed approach (MA) stop-and-go, or full-stop landing, at the discretion of the pilot. (b) For a departing aircraft: An expression used to indicate ATC authorization for an aircraft to execute manoeuvres other than a normal takeoff (e.g. an aborted takeoff) After such a manoeuvre, the pilot is expected to exit the runway by the most expeditious way rather than backtrack the runway. |
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| "Cleared for the option" |
For an arriving aircraft: An expression used to indicate ATC authorization for an aircraft to make a touch-and-go, low approach, missed approach, stop-and-go, or full-stop landing, at the discretion of the pilot |
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| "Cleared through" |
An expression used to indicate ATC authorization for an aircraft to make intermediate stops at specified airports without refiling a flight plan (FP) while en route to the clearance limit |
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| "Cleared to land" |
An expression used to indicate ATC authorization for an aircraft to land. It is predicated on known aircraft and known physical airport conditions. |
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| "Cleared via flight-planned route" |
An expression indicating that the aircraft is cleared to proceed in accordance with the route of flight filed in the flight plan (FP) This clearance does not include the altitude, standard instrument departure (SID) or SID transition. |
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| "Contact" |
An expression used in radiocommunication meaning "Visual contact has been established." |
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| "Contact..." |
An expression used in radiocommunication to establish communication with a facility |
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| "Correction" |
An expression used in radiocommunication meaning "An error has been made in this transmission (or in the message indicated) The correct version is ..." |
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| "Disregard" |
An expression used in radiocommunication meaning "Ignore or consider that transmission as not sent." |
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