Civil aviation dictionary
Aviation glossary
Terms, abbreviations and procedures explained without unnecessary jargon, with English names and clear definitions.
- Total entries
- 2480
- Terms
- 435
- Abbreviations
- 2045
C
- AbbreviationCivilian Air Routes System
CARS stands for Civilian Air Routes System in FAA terminology.
- AbbreviationClass A Airspace
CAAS stands for Class A Airspace in FAA terminology.
- AbbreviationClass B airspace
CBAS stands for Class B airspace in FAA terminology.
- AbbreviationClass C airspace
CCAS stands for Class C airspace in FAA terminology.
- AbbreviationClass C surface area
CCSA stands for Class C surface area in FAA terminology.
- AbbreviationClass D airspace
CDAS stands for Class D airspace in FAA terminology.
- AbbreviationClass E airspace
CEAS stands for Class E airspace in FAA terminology.
- AbbreviationClean Air Act
CAA stands for Clean Air Act in FAA terminology.
- OperationsCLEAR AIR TURBULENCE (CAT)
Turbulence encountered in air where no clouds are present.
- Abbreviationclear of clouds
CCLDS stands for clear of clouds in FAA terminology.
- Abbreviationclear or scattered clouds and visibility greater than ten miles
CAVU stands for clear or scattered clouds and visibility greater than ten miles in FAA terminology.
- Abbreviationclear or scattered clouds and visibility greater than ten, remainder of report missing (weather reports only)
DCAVU stands for clear or scattered clouds and visibility greater than ten, remainder of report missing (weather reports only) in FAA terminology.
- Radio communications and ATCCLEARANCE VOID IF NOT OFF BY (TIME)
Used by ATC to advise an aircraft that the departure release is automatically canceled if takeoff is not made prior to a specified time.
- Flying skillsCLEARED APPROACH
ATC authorization for an aircraft to execute any standard or special instrument approach procedure for that airport.
- OperationsCLEARED AS FILED
Means the aircraft is cleared to proceed in accordance with the route of flight filed in the flight plan.
- Abbreviationcleared Customs
CCUS stands for cleared Customs in FAA terminology.
- Abbreviationcleared for approach
CFAP stands for cleared for approach in FAA terminology.
- Flying skillsCLEARED FOR TAKEOFF
ATC authorization for an aircraft to depart. It is predicated on known traffic and known physical airport conditions.
- OperationsCLEARED FOR THE OPTION
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.
- AbbreviationCleared to fix
F stands for Cleared to fix in FAA terminology.
- OperationsCLEARED TO LAND
ATC authorization for an aircraft to land. It is predicated on known traffic and known physical airport conditions.
- Abbreviationclears, or cleared to, or clearance
CLR stands for clears, or cleared to, or clearance in FAA terminology.
- OperationsCLEARWAY
An area beyond the takeoff runway under the control of airport authorities within which terrain or fixed obstacles may not extend above specified limits.
- Flying skillsClimb
The flight phase during which aircraft altitude increases.