Pilot/Controller Glossary Pilot/Controller Glossary  8/15/19 7/16/20  ASP- (See ARRIVAL SEQUENCING PROGRAM.)  takeoff. Arresting systems have various names; e.g.,  arresting gear, hook device, wire barrier cable.  (See ABORT.)  (Refer to AIM.)  ASR- (See AIRPORT SURVEILLANCE RADAR.)  ASR APPROACH- (See SURVEILLANCE APPROACH.)  ARRIVAL AIRCRAFT INTERVAL- An internally  generated program in hundredths of minutes based  upon the AAR. AAI is the desired optimum interval  between successive arrival aircraft over the vertex.  ASSOCIATED- A radar target displaying a data  block with flight identification and altitude  information.  (See UNASSOCIATED.)  ATC- (See AIR TRAFFIC CONTROL.)  ARRIVAL CENTER- The ARTCC having jurisdic- tion for the impacted airport.  ARRIVAL DELAY- A parameter which specifies a  period of time in which no aircraft will be metered for  arrival at the specified airport.  ARRIVAL SECTOR- An operational control sector  containing one or more meter fixes.  ATC ADVISES- Used to prefix a message of  noncontrol information when it is relayed to an  aircraft by other than an air traffic controller.  (See ADVISORY.)  ATC ASSIGNED AIRSPACE- Airspace of defined  vertical/lateral limits, assigned by ATC, for the  purpose of providing air traffic segregation between  the specified activities being conducted within the  assigned airspace and other IFR air traffic.  ARRIVAL SECTOR ADVISORY LIST- An  ordered list of data on arrivals displayed at the  PVD/MDM of the sector which controls the meter  fix.  ARRIVAL SEQUENCING PROGRAM- The auto- mated program designed to assist in sequencing  aircraft destined for the same airport.  (See SPECIAL USE AIRSPACE.)  ATC CLEARANCE- (See AIR TRAFFIC CLEARANCE.)  ARRIVAL TIME- The time an aircraft touches down  on arrival.  ATC CLEARS- Used to prefix an ATC clearance  when it is relayed to an aircraft by other than an air  traffic controller.  ATC INSTRUCTIONS- Directives issued by air  traffic control for the purpose of requiring a pilot to  take specific actions; e.g., “Turn left heading two five  zero,” “Go around,” “Clear the runway.”  (Refer to 14 CFR Part 91.)  ARSR- (See AIR ROUTE SURVEILLANCE RADAR.)  ARTCC- (See AIR ROUTE TRAFFIC CONTROL  CENTER.)  ASDA- (See ACCELERATE-STOP DISTANCE  AVAILABLE.)  ASDA [ICAO]- (See ICAO Term ACCELERATE-STOP  DISTANCE AVAILABLE.)  ATC PREFERRED ROUTE NOTIFICATION- EDST notification to the appropriate controller of the  need to determine if an ATC preferred route needs to  be applied, based on destination airport.  (See ROUTE ACTION NOTIFICATION.)  (See EN ROUTE DECISION SUPPORT TOOL.)  ATC PREFERRED ROUTES- Preferred routes that  are not automatically applied by Host.  ATC REQUESTS- Used to prefix an ATC request  when it is relayed to an aircraft by other than an air  traffic controller.  ATC SECURITY SERVICES- Communications  and security tracking provided by an ATC facility in  ASDE- (See AIRPORT SURFACE DETECTION  EQUIPMENT.)  ASF- (See AIRPORT STREAM FILTER.)  ASLAR- (See AIRCRAFT SURGE LAUNCH AND  RECOVERY.)  PCG A-13 