Pilot/Controller Glossary
12/2/21
weather information transmitted from ground
stations.
(See AUTOMATIC DEPENDENT
SURVEILLANCE
−
BROADCAST OUT.)
(See AUTOMATIC DEPENDENT
SURVEILLANCE
−
REBROADCAST.)
(See FLIGHT INFORMATION
SERVICE
−
BROADCAST.)
(See TRAFFIC INFORMATION
SERVICE
−
BROADCAST.)
AUTOMATIC DEPENDENT SURVEILLANCE
−
BROADCAST OUT (ADS
−
B Out)
−
The transmitter
onboard an aircraft or ground vehicle that
periodically broadcasts its GNSS
−
derived position
along with other required information, such as
identity, altitude, and velocity.
(See AUTOMATIC DEPENDENT
SURVEILLANCE
−
BROADCAST.)
(See AUTOMATIC DEPENDENT
SURVEILLANCE
−
BROADCAST IN.)
AUTOMATIC DEPENDENT SURVEILLANCE
−
CONTRACT (ADS
−
C)
−
A data link position
reporting system, controlled by a ground station, that
establishes contracts with an aircraft’s avionics that
occur automatically whenever specific events occur,
or specific time intervals are reached.
AUTOMATIC DEPENDENT SURVEILLANCE
REBROADCAST (ADSR)
−
A datalink translation
function of the ADS
−
B ground system required to
accommodate the two separate operating frequencies
(978 MHz and 1090 MHz). The ADS
−
B system
receives the ADS
−
B messages transmitted on one
frequency and ADS
−
R translates and reformats the
information for rebroadcast and use on the other
frequency. This allows ADS
−
B In equipped aircraft
to see nearby ADS
−
B Out traffic regardless of the
operating link of the other aircraft. Aircraft operating
on the same ADS
−
B frequency exchange information
directly and do not require the ADS
−
R translation
function.
AUTOMATIC DIRECTION FINDER
−
An aircraft
radio navigation system which senses and indicates
the direction to a L/MF nondirectional radio beacon
(NDB) ground transmitter. Direction is indicated to
the pilot as a magnetic bearing or as a relative bearing
to the longitudinal axis of the aircraft depending on
the type of indicator installed in the aircraft. In certain
applications, such as military, ADF operations may
be based on airborne and ground transmitters in the
VHF/UHF frequency spectrum.
(See BEARING.)
(See NONDIRECTIONAL BEACON.)
AUTOMATIC FLIGHT INFORMATION SER
VICE (AFIS)
−
ALASKA FSSs ONLY
−
The
continuous broadcast of recorded non
−
control
information at airports in Alaska where a FSS
provides local airport advisory service. The AFIS
broadcast automates the repetitive transmission of
essential but routine information such as weather,
wind, altimeter, favored runway, braking action,
airport NOTAMs, and other applicable information.
The information is continuously broadcast over a
discrete VHF radio frequency (usually the ASOS/
AWOS frequency).
AUTOMATIC TERMINAL INFORMATION SER
VICE
−
The continuous broadcast of recorded
noncontrol information in selected terminal areas. Its
purpose is to improve controller effectiveness and to
relieve frequency congestion by automating the
repetitive transmission of essential but routine
information; e.g., “Los Angeles information Alfa.
One three zero zero Coordinated Universal Time.
Weather, measured ceiling two thousand overcast,
visibility three, haze, smoke, temperature seven one,
dew point five seven, wind two five zero at five,
altimeter two niner niner six. ILS Runway Two Five
Left approach in use, Runway Two Five Right closed,
advise you have Alfa.”
(See ICAO term AUTOMATIC TERMINAL
INFORMATION SERVICE.)
(Refer to AIM.)
AUTOMATIC TERMINAL INFORMATION SER
VICE [ICAO]
−
The provision of current, routine
information to arriving and departing aircraft by
means of continuous and repetitive broadcasts
throughout the day or a specified portion of the day.
AUTOROTATION
−
A rotorcraft flight condition in
which the lifting rotor is driven entirely by action of
the air when the rotorcraft is in motion.
a.
Autorotative Landing/Touchdown Autorota
tion. Used by a pilot to indicate that the landing will
be made without applying power to the rotor.
b.
Low Level Autorotation. Commences at an
altitude well below the traffic pattern, usually below
100 feet AGL and is used primarily for tactical
military training.
PCG A
−
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