12/2/21
Pilot/Controller Glossary
A
AAR
−
(See AIRPORT ARRIVAL RATE.)
ABBREVIATED IFR FLIGHT PLANS
−
An
authorization by ATC requiring pilots to submit only
that information needed for the purpose of ATC. It
includes only a small portion of the usual IFR flight
plan information. In certain instances, this may be
only aircraft identification, location, and pilot
request. Other information may be requested if
needed by ATC for separation/control purposes. It is
frequently used by aircraft which are airborne and
desire an instrument approach or by aircraft which are
on the ground and desire a climb to VFRontop.
(See VFR-ON-TOP.)
(Refer to AIM.)
ABEAM
−
An aircraft is “abeam” a fix, point, or
object when that fix, point, or object is approximately
90 degrees to the right or left of the aircraft track.
Abeam indicates a general position rather than a
precise point.
ABORT
−
To terminate a preplanned aircraft
maneuver; e.g., an aborted takeoff.
ABRR
−
(See AIRBORNE REROUTE)
ACC [ICAO]
−
(See ICAO term AREA CONTROL CENTER.)
ACCELERATESTOP DISTANCE AVAILABLE
−
The runway plus stopway length declared available
and suitable for the acceleration and deceleration of
an airplane aborting a takeoff.
ACCELERATESTOP DISTANCE AVAILABLE
[ICAO]
−
The length of the takeoff run available plus
the length of the stopway if provided.
ACDO
−
(See AIR CARRIER DISTRICT OFFICE.)
ACKNOWLEDGE
−
Let me know that you have
received and understood this message.
ACL
−
(See AIRCRAFT LIST.)
ACLS
−
(See AUTOMATIC CARRIER LANDING
SYSTEM.)
ACROBATIC FLIGHT
−
An intentional maneuver
involving an abrupt change in an aircraft’s attitude, an
abnormal attitude, or abnormal acceleration not
necessary for normal flight.
(See ICAO term ACROBATIC FLIGHT.)
(Refer to 14 CFR Part 91.)
ACROBATIC FLIGHT [ICAO]
−
Maneuvers inten
tionally performed by an aircraft involving an abrupt
change in its attitude, an abnormal attitude, or an
abnormal variation in speed.
ACTIVE RUNWAY
−
(See RUNWAY IN USE/ACTIVE RUNWAY/DUTY
RUNWAY.)
ACTUAL NAVIGATION PERFORMANCE
(ANP)
−
(See REQUIRED NAVIGATION
PERFORMANCE.)
ADDITIONAL SERVICES
−
Advisory information
provided by ATC which includes but is not limited to
the following:
a.
Traffic advisories.
b.
Vectors, when requested by the pilot, to assist
aircraft receiving traffic advisories to avoid observed
traffic.
c.
Altitude deviation information of 300 feet or
more from an assigned altitude as observed on a
verified (reading correctly) automatic altitude
readout (Mode C).
d.
Advisories that traffic is no longer a factor.
e.
Weather and chaff information.
f.
Weather assistance.
g.
Bird activity information.
h.
Holding pattern surveillance. Additional ser
vices are provided to the extent possible contingent
only upon the controller’s capability to fit them into
the performance of higher priority duties and on the
basis of limitations of the radar, volume of traffic,
frequency congestion, and controller workload. The
controller has complete discretion for determining if
he/she is able to provide or continue to provide a
PCG A
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