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Pilot/Controller Glossary 

12/2/21 

service in a particular case. The controller’s reason 
not to provide or continue to provide a service in a 
particular case is not subject to question by the pilot 
and need not be made known to him/her. 

(See TRAFFIC ADVISORIES.) 

(Refer to AIM.) 

ADF

 

(See AUTOMATIC DIRECTION FINDER.) 

ADIZ

 

(See AIR DEFENSE IDENTIFICATION ZONE.) 

ADLY

 

(See ARRIVAL DELAY.) 

ADMINISTRATOR

 The Federal Aviation Admin­

istrator or any person to whom he/she has delegated 
his/her authority in the matter concerned. 

ADR

 

(See AIRPORT DEPARTURE RATE.) 

ADS [ICAO]

 

(See ICAO term AUTOMATIC DEPENDENT 

SURVEILLANCE.) 

ADS

B

 

(See AUTOMATIC DEPENDENT 

SURVEILLANCE

BROADCAST.) 

ADS

C

 

(See AUTOMATIC DEPENDENT 

SURVEILLANCE

CONTRACT.) 

ADVISE INTENTIONS

 Tell me what you plan to 

do. 

ADVISORY

 Advice and information provided to 

assist pilots in the safe conduct of flight and aircraft 
movement. 

(See ADVISORY SERVICE.) 

ADVISORY FREQUENCY

 The appropriate fre­

quency to be used for Airport Advisory Service. 

(See LOCAL AIRPORT ADVISORY.) 

(See UNICOM.) 

(Refer to ADVISORY CIRCULAR NO. 90-66.) 

(Refer to AIM.) 

ADVISORY SERVICE

 Advice and information 

provided by a facility to assist pilots in the safe 
conduct of flight and aircraft movement. 

(See ADDITIONAL SERVICES.) 
(See LOCAL AIRPORT ADVISORY.) 
(See RADAR ADVISORY.) 
(See SAFETY ALERT.) 
(See TRAFFIC ADVISORIES.) 
(Refer to AIM.) 

ADW

 

(See ARRIVAL DEPARTURE WINDOW) 

AERIAL REFUELING

 A procedure used by the 

military to transfer fuel from one aircraft to another 
during flight. 

(Refer to VFR/IFR Wall Planning Charts.) 

AERODROME

 A defined area on land or water 

(including any buildings, installations and equip­
ment) intended to be used either wholly or in part for 
the arrival, departure, and movement of aircraft. 

AERODROME BEACON [ICAO]

 Aeronautical 

beacon used to indicate the location of an aerodrome 
from the air. 

AERODROME CONTROL SERVICE [ICAO]

 Air 

traffic control service for aerodrome traffic. 

AERODROME CONTROL TOWER [ICAO]

 A 

unit established to provide air traffic control service 
to aerodrome traffic. 

AERODROME ELEVATION [ICAO]

 The eleva­

tion of the highest point of the landing area. 

AERODROME TRAFFIC CIRCUIT [ICAO]

 The 

specified path to be flown by aircraft operating in the 
vicinity of an aerodrome. 

AERONAUTICAL BEACON

 A visual NAVAID 

displaying flashes of white and/or colored light to 
indicate the location of an airport, a heliport, a 
landmark, a certain point of a Federal airway in 
mountainous terrain, or an obstruction. 

(See AIRPORT ROTATING BEACON.) 
(Refer to AIM.) 

AERONAUTICAL CHART

 A map used in air 

navigation containing all or part of the following: 
topographic features, hazards and obstructions, 
navigation aids, navigation routes, designated 
airspace, and airports. Commonly used aeronautical 
charts are: 

a. 

Sectional Aeronautical Charts (1:500,000)

 

Designed for visual navigation of slow or medium 

PCG A