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Aeronautical Information Manual (AIM), page 612

Pilot/Controller Glossary 5/26/16


AIP [ICAO]-
(See ICAO term AERONAUTICAL
INFORMATION PUBLICATION.)

AIR CARRIER DISTRICT OFFICE- An FAA field

office serving an assigned geographical area, staffed

with Flight Standards personnel serving the aviation

industry and the general public on matters related to

the certification and operation of scheduled air

carriers and other large aircraft operations.

AIR DEFENSE EMERGENCY- A military emer-

gency condition declared by a designated authority.

This condition exists when an attack upon the

continental U.S., Alaska, Canada, or U.S. installa-

tions in Greenland by hostile aircraft or missiles is

considered probable, is imminent, or is taking place.

(Refer to AIM.)

AIR DEFENSE IDENTIFICATION ZONE (ADIZ)-
The area of airspace over land or water, extending
upward from the surface, within which the ready
identification, the location, and the control of aircraft
are required in the interest of national security.
a. Domestic Air Defense Identification Zone. An
ADIZ within the United States along an international
boundary of the United States.
b. Coastal Air Defense Identification Zone. An
ADIZ over the coastal waters of the United States.
c. Distant Early Warning Identification Zone
(DEWIZ). An ADIZ over the coastal waters of the
State of Alaska.
d. Land-Based Air Defense Identification Zone.
An ADIZ over U.S. metropolitan areas, which is
activated and deactivated as needed, with dimen-
sions, activation dates and other relevant information
disseminated via NOTAM.
Note: ADIZ locations and operating and flight plan
requirements for civil aircraft operations are speci-
fied in 14 CFR Part 99.

(Refer to AIM.)

AIR NAVIGATION FACILITY- Any facility used
in, available for use in, or designed for use in, aid of
air navigation, including landing areas, lights, any
apparatus or equipment for disseminating weather
information, for signaling, for radio-directional
finding, or for radio or other electrical communica-
tion, and any other structure or mechanism having a
similar purpose for guiding or controlling flight in the
air or the landing and takeoff of aircraft.
(See NAVIGATIONAL AID.)
12/10/15

AIR ROUTE SURVEILLANCE RADAR- Air route
traffic control center (ARTCC) radar used primarily
to detect and display an aircraft's position while en
route between terminal areas. The ARSR enables

controllers to provide radar air traffic control service

when aircraft are within the ARSR coverage. In some

instances, ARSR may enable an ARTCC to provide

terminal radar services similar to but usually more

limited than those provided by a radar approach

control.

AIR ROUTE TRAFFIC CONTROL CENTER- A

facility established to provide air traffic control

service to aircraft operating on IFR flight plans

within controlled airspace and principally during the

en route phase of flight. When equipment capabilities

and controller workload permit, certain advisory/as-

sistance services may be provided to VFR aircraft.
(See EN ROUTE AIR TRAFFIC CONTROL
SERVICES.)
(Refer to AIM.)
AIR TAXI- Used to describe a helicopter/VTOL
aircraft movement conducted above the surface but
normally not above 100 feet AGL. The aircraft may
proceed either via hover taxi or flight at speeds more
than 20 knots. The pilot is solely responsible for
selecting a safe airspeed/altitude for the operation
being conducted.
(See HOVER TAXI.)
(Refer to AIM.)
AIR TRAFFIC- Aircraft operating in the air or on an
airport surface, exclusive of loading ramps and
parking areas.
(See ICAO term AIR TRAFFIC.)
AIR TRAFFIC [ICAO]- All aircraft in flight or
operating on the maneuvering area of an aerodrome.

AIR TRAFFIC CLEARANCE- An authorization by
air traffic control for the purpose of preventing
collision between known aircraft, for an aircraft to

proceed under specified traffic conditions within
controlled airspace. The pilot-in-command of an
aircraft may not deviate from the provisions of a
visual flight rules (VFR) or instrument flight rules
(IFR) air traffic clearance except in an emergency or
unless an amended clearance has been obtained.
Additionally, the pilot may request a different
clearance from that which has been issued by air
traffic control (ATC) if information available to the
pilot makes another course of action more practicable
or if aircraft equipment limitations or company

PCG A-4

Page 612 of the Aeronautical Information Manual (AIM.pdf)
AIM: Official Guide to Basic Flight Information and ATC Procedures

Index   611 -- Page 612 -- 613