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Pilot/Controller Glossary

3/29/18

PCG A−11

not served by an approach control facility, the

ARTCC provides limited approach control service.

(See ICAO term APPROACH CONTROL

SERVICE.)

(Refer to AIM.)

APPROACH CONTROL SERVICE [ICAO]− Air

traffic control service for arriving or departing

controlled flights.

APPROACH GATE− An imaginary point used

within ATC as a basis for vectoring aircraft to the

final approach course. The gate will be established

along the final approach course 1 mile from the final

approach fix on the side away from the airport and

will be no closer than 5 miles from the landing

threshold.

APPROACH/DEPARTURE HOLD AREA− The

locations on taxiways in the approach or departure

areas of a runway designated to protect landing or

departing aircraft. These locations are identified by

signs and markings.

APPROACH LIGHT SYSTEM−

(See AIRPORT LIGHTING.)

APPROACH SEQUENCE− The order in which

aircraft are positioned while on approach or awaiting

approach clearance.

(See LANDING SEQUENCE.)
(See ICAO term APPROACH SEQUENCE.)

APPROACH SEQUENCE [ICAO]− The order in

which two or more aircraft are cleared to approach to

land at the aerodrome.
APPROACH SPEED−  The recommended speed

contained in aircraft manuals used by pilots when

making an approach to landing. This speed will vary

for different segments of an approach as well as for

aircraft weight and configuration.

APPROACH WITH VERTICAL GUIDANCE

(APV)– A term used to describe RNAV approach

procedures that provide lateral and vertical guidance

but do not meet the requirements to be considered a

precision approach.

APPROPRIATE ATS AUTHORITY [ICAO]− The

relevant authority designated by the State responsible

for providing air traffic services in the airspace

concerned. In the United States, the “appropriate ATS

authority” is the Program Director for Air Traffic

Planning and Procedures, ATP-1.

APPROPRIATE AUTHORITY−

a. Regarding flight over the high seas: the relevant

authority is the State of Registry.

b. Regarding flight over other than the high seas:

the relevant authority is the State having sovereignty

over the territory being overflown.
APPROPRIATE OBSTACLE CLEARANCE

MINIMUM ALTITUDE− Any of the following:

(See MINIMUM EN ROUTE IFR ALTITUDE.)
(See MINIMUM IFR ALTITUDE.)
(See MINIMUM OBSTRUCTION CLEARANCE

ALTITUDE.)

(See MINIMUM VECTORING ALTITUDE.)

APPROPRIATE TERRAIN CLEARANCE

MINIMUM ALTITUDE− Any of the following:

(See MINIMUM EN ROUTE IFR ALTITUDE.)
(See MINIMUM IFR ALTITUDE.)
(See MINIMUM OBSTRUCTION CLEARANCE

ALTITUDE.)

(See MINIMUM VECTORING ALTITUDE.)

APRON− A defined area on an airport or heliport

intended to accommodate aircraft for purposes of

loading or unloading passengers or cargo, refueling,

parking, or maintenance. With regard to seaplanes, a

ramp is used for access to the apron from the water.

(See ICAO term APRON.)

APRON [ICAO]− A defined area, on a land

aerodrome, intended to accommodate aircraft for

purposes of loading or unloading passengers, mail or

cargo, refueling, parking or maintenance.
ARC− The track over the ground of an aircraft flying

at a constant distance from a navigational aid by

reference to distance measuring equipment (DME).
AREA CONTROL CENTER [ICAO]− An air traffic

control facility primarily responsible for ATC

services being provided IFR aircraft during the en

route phase of flight. The U.S. equivalent facility is

an air route traffic control center (ARTCC).
AREA NAVIGATION (RNAV)− A method of

navigation which permits aircraft operation on any

desired flight path within the coverage of ground− or

space−based navigation aids or within the limits of

the capability of self-contained aids, or a combination

of these.

Note: Area navigation includes

performance−based navigation as well as other

operations that do not meet the definition of

performance−based navigation.