takeoff. Arresting systems have various names; e.g., arresting gear, hook device, wire barrier cable. 

(See ABORT.) 

(Refer to AIM.) 

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. 

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. 

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. 

ARRIVAL TIME- The time an aircraft touches down on arrival. 

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.) 

ASDE- (See AIRPORT SURFACE DETECTION EQUIPMENT.) 

ASF- (See AIRPORT STREAM FILTER.) 

ASLAR- (See AIRCRAFT SURGE LAUNCH AND RECOVERY.) 

ASP- (See ARRIVAL SEQUENCING PROGRAM.) 

ASR- (See AIRPORT SURVEILLANCE RADAR.) 

ASR APPROACH- (See SURVEILLANCE APPROACH.) 

ASSOCIATED- A radar target displaying a data block with flight identification and altitude information. 

(See UNASSOCIATED.) 

ATC- (See AIR TRAFFIC CONTROL.) 

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. 

(See SPECIAL USE AIRSPACE.) 

ATC CLEARANCE- (See AIR TRAFFIC CLEARANCE.) 

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.) 

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 

