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Pilot/Controller Glossary 

12/2/21 

the types of routes that comprise the United States 
route structure. 

AIRBORNE

 An aircraft is considered airborne 

when all parts of the aircraft are off the ground. 

AIRBORNE DELAY

  Amount of delay to be 

encountered in airborne holding. 

AIRBORNE REROUTE (ABRR)

 A capability 

within the Traffic Flow Management System used for 
the timely development and implementation of 
tactical reroutes for airborne aircraft. This capability 
defines a set of aircraft

specific reroutes that address 

a certain traffic flow problem and then electronically 
transmits them to En Route Automation Moderniza­
tion (ERAM) for execution by the appropriate sector 
controllers. 

AIRCRAFT

 Device(s) that are used or intended to 

be used for flight in the air, and when used in air traffic 
control terminology, may include the flight crew. 

(See ICAO term AIRCRAFT.) 

AIRCRAFT [ICAO]

 Any machine that can derive 

support in the atmosphere from the reactions of the air 
other than the reactions of the air against the earth’s 
surface. 

AIRCRAFT APPROACH CATEGORY

 A 

grouping of aircraft based on a speed of 1.3 times the 
stall speed in the landing configuration at maximum 
gross landing weight. An aircraft must fit in only one 
category. If it is necessary to maneuver at speeds in 
excess of the upper limit of a speed range for a 
category, the minimums for the category for that 
speed must be used. For example, an aircraft which 
falls in Category A, but is circling to land at a speed 
in excess of 91 knots, must use the approach 
Category B minimums when circling to land. The 
categories are as follows: 

a. 

Category A

 Speed less than 91 knots. 

b. 

Category B

 Speed 91 knots or more but less 

than 121 knots. 

c. 

Category C

 Speed 121 knots or more but less 

than 141 knots. 

d. 

Category D

 Speed 141 knots or more but less 

than 166 knots. 

e. 

Category E

 Speed 166 knots or more. 

(Refer to 14 CFR Part 97.) 

AIRCRAFT CLASSES

 For the purposes of Wake 

Turbulence Separation Minima, ATC classifies 
aircraft as Super, Heavy, Large, and Small as follows: 

a. 

Super. The Airbus A­380­800 (A388) and the 

Antonov An­225 (A225) are classified as super. 

b. 

Heavy

 Aircraft capable of takeoff weights of 

300,000 pounds or more whether or not they are 
operating at this weight during a particular phase of 
flight. 

c. 

Large

 Aircraft of more than 41,000 pounds, 

maximum certificated takeoff weight, up to but not 
including 300,000 pounds. 

d. 

Small

 Aircraft of 41,000 pounds or less 

maximum certificated takeoff weight. 

(Refer to AIM.) 

AIRCRAFT CONFLICT

 Predicted conflict, within 

EDST of two aircraft, or between aircraft and 
airspace. A Red alert is used for conflicts when the 
predicted minimum separation is 5 nautical miles or 
less. A Yellow alert is used when the predicted 
minimum separation is between 5 and approximately 
12 nautical miles. A Blue alert is used for conflicts 
between an aircraft and predefined airspace. 

(See 

EN ROUTE DECISION SUPPORT 

TOOL

.) 

AIRCRAFT LIST (ACL)

 A view available with 

EDST that lists aircraft currently in or predicted to be 
in a particular sector’s airspace. The view contains 
textual flight data information in line format and may 
be sorted into various orders based on the specific 
needs of the sector team. 

(See 

EN ROUTE DECISION  SUPPORT 

TOOL

.) 

AIRCRAFT SURGE LAUNCH AND 
RECOVERY

 Procedures used at USAF bases to 

provide increased launch and recovery rates in 
instrument flight rules conditions. ASLAR is based 
on: 

a. 

Reduced separation between aircraft which is 

based on time or distance. Standard arrival separation 
applies between participants including multiple 
flights until the DRAG point. The DRAG point is a 
published location on an ASLAR approach where 
aircraft landing second in a formation slows to a 
predetermined airspeed. The DRAG point is the 
reference point at which MARSA applies as 
expanding elements effect separation within a flight 
or between subsequent participating flights. 

PCG A