CARS

Course - Horizontal intended direction of flight measured in degrees from north. Also known as "Track".
CAVOK - Ceiling and Visibility OK, Term used to indicate no cloud below 5000 feet
CARS - Community Aerodrome Radio Station ...

the North American Aerospace Defense Command (NORAD) North Warning System (NWS) radar system, and has a network of 23 RCO's located across Canada's Arctic coast. The 3 northern hubs also assist and oversee the "Community Airport Radio Station" (CARS) ...

See also: NOTAM, Flight, FSS, Range, Air traffic