Pilot/Controller Glossary Pilot/Controller Glossary  8/15/19 1/30/20  14 CFR Part 91.3(a) states: “The pilot in command  of an aircraft is directly responsible for, and is the  final authority as to, the operation of that aircraft.”  THE PILOT IS RESPONSIBLE TO REQUEST AN  AMENDED CLEARANCE if ATC issues a  clearance that would cause a pilot to deviate from a  rule or regulation, or in the pilot's opinion, would  place the aircraft in jeopardy.  AIR TRAFFIC CONTROL- A service operated by  appropriate authority to promote the safe, orderly and  expeditious flow of air traffic.  AIR TRAFFIC CONTROL CLEARANCE [ICAO]- Authorization for an aircraft to proceed under  conditions specified by an air traffic control unit.  AIR TRAFFIC CONTROL SERVICE [ICAO]- A  service provided for the purpose of:  2.  On the maneuvering area between aircraft  and obstructions.  b.  Expediting and maintaining an orderly flow of  air traffic.  1.  Between aircraft; and  AIR TRAFFIC CONTROL SPECIALIST- A person  authorized to provide air traffic control service.  AIR TRAFFIC CONTROL SYSTEM COMMAND  CENTER (ATCSCC)- An Air Traffic Tactical  Operations facility responsible for monitoring and  managing the flow of air traffic throughout the NAS,  producing a safe, orderly, and expeditious flow of  AIRBORNE- An aircraft is considered airborne  when all parts of the aircraft are off the ground.  AIR TRAFFIC SERVICE (ATS) ROUTES - The  term “ATS Route” is a generic term that includes  “VOR Federal airways,” “colored Federal airways,”  “jet routes,” and “RNAV routes.” The term “ATS  route” does not replace these more familiar route  names, but serves only as an overall title when listing  the types of routes that comprise the United States  route structure.  AIR TRAFFIC SERVICE- A generic term meaning:  d.  Weather Unit. Monitor all aspects of weather  for the U.S. that might affect aviation including cloud  cover, visibility, winds, precipitation, thunderstorms,  icing, turbulence, and more. Provide forecasts based  on observations and on discussions with meteorolo- gists from various National Weather Service offices,  FAA facilities, airlines, and private weather services.  c.  U.S. Notice to Airmen (NOTAM) Office.  Responsible for collecting, maintaining, and distrib- uting NOTAMs for the U.S. civilian and military, as  well as international aviation communities.  b.  Airport Reservation Office (ARO). Monitors  the operation and allocation of reservations for  unscheduled operations at airports designated by the  Administrator as High Density Airports. These  airports are generally known as slot controlled  airports. The ARO allocates reservations on a first  come, first served basis determined by the time the  request is received at the ARO.  a.  Central Altitude Reservation Function  (CARF). Responsible for coordinating, planning,  and approving special user requirements under the  Altitude Reservation (ALTRV) concept.  traffic while minimizing delays. The following  functions are located at the ATCSCC:  Note 1: For convenience, the term air traffic control  clearance is frequently abbreviated to clearance  when used in appropriate contexts.  Note 2: The abbreviated term clearance may be  prefixed by the words taxi, takeoff, departure, en  route, approach or landing to indicate the particular  portion of flight to which the air traffic control clear- ance relates.  a.  Flight Information Service.  b.  Alerting Service.  c.  Air Traffic Advisory Service.  d.  Air Traffic Control Service:  1.  Area Control Service,  2.  Approach Control Service, or  3.  Airport Control Service.  a.  Preventing collisions:  AIR TRAFFIC CONTROL SERVICE- PCG A-5  (See ATC INSTRUCTIONS.)  (See ICAO term AIR TRAFFIC CONTROL  CLEARANCE.)  (See ALTITUDE RESERVATION.)  (See ICAO term AIR TRAFFIC CONTROL  SERVICE.)  (Refer to 14 CFR Part 93.)  (See CHART SUPPLEMENT U.S.)  (See NOTICE TO AIRMEN.)  (See AIR TRAFFIC CONTROL.)  (See AIR TRAFFIC CONTROL.)  (See FLIGHT SERVICE STATION.)  (See ICAO term CONTROLLER.) 