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Pilot/Controller Glossary
b.
ASLAR procedures shall be covered in a Letter
of Agreement between the responsible USAF
military ATC facility and the concerned Federal
Aviation Administration facility. Initial Approach
Fix spacing requirements are normally addressed as
a minimum.
AIRCRAFT HAZARD AREA (AHA)
−
Used by
ATC to segregate air traffic from a launch vehicle,
reentry vehicle, amateur rocket, jettisoned stages,
hardware, or falling debris generated by failures
associated with any of these activities. An AHA is
designated via NOTAM as either a TFR or stationary
ALTRV. Unless otherwise specified, the vertical
limits of an AHA are from the surface to unlimited.
(See CONTINGENCY HAZARD AREA.)
(See REFINED HAZARD AREA.)
(See TRANSITIONAL HAZARD AREA.)
AIRCRAFT WAKE TURBULENCE CATE-
GORIES
−
For the purpose of Wake Turbulence
Recategorization (RECAT) Separation Minima, ATC
groups aircraft into categories ranging from Category
A through Category I, dependent upon the version of
RECAT that is applied. Specific category assign-
ments vary and are listed in the RECAT Orders.
AIRMEN’S METEOROLOGICAL INFORMA-
TION (AIRMET)
−
In-flight weather advisories
issued only to amend the Aviation Surface Forecast,
Aviation Cloud Forecast, or area forecast concerning
weather phenomena which are of operational interest
to all aircraft and potentially hazardous to aircraft
having limited capability because of lack of
equipment, instrumentation, or pilot qualifications.
AIRMETs concern weather of less severity than that
covered by SIGMETs or Convective SIGMETs.
AIRMETs cover moderate icing, moderate turbu-
lence, sustained winds of 30 knots or more at the
surface, widespread areas of ceilings less than 1,000
feet and/or visibility less than 3 miles, and extensive
mountain obscurement.
(See CONVECTIVE SIGMET.)
(See CWA.)
(See SAW.)
(See SIGMET.)
(Refer to AIM.)
AIRPORT
−
An area on land or water that is used or
intended to be used for the landing and takeoff of
aircraft and includes its buildings and facilities, if
any.
AIRPORT ADVISORY AREA
−
The area within ten
miles of an airport without a control tower or where
the tower is not in operation, and on which a Flight
Service Station is located.
(See LOCAL AIRPORT ADVISORY.)
(Refer to AIM.)
AIRPORT ARRIVAL RATE (AAR)
−
A dynamic
input parameter specifying the number of arriving
aircraft which an airport or airspace can accept from
the ARTCC per hour. The AAR is used to calculate
the desired interval between successive arrival
aircraft.
AIRPORT DEPARTURE RATE (ADR)
−
A dynamic
parameter specifying the number of aircraft which
can depart an airport and the airspace can accept per
hour.
AIRPORT ELEVATION
−
The highest point of an
airport’s usable runways measured in feet from mean
sea level.
(See TOUCHDOWN ZONE ELEVATION.)
(See ICAO term AERODROME ELEVATION.)
AIRPORT LIGHTING
−
Various lighting aids that
may be installed on an airport. Types of airport
lighting include:
a.
Approach Light System (ALS)
−
An airport
lighting facility which provides visual guidance to
landing aircraft by radiating light beams in a
directional pattern by which the pilot aligns the
aircraft with the extended centerline of the runway on
his/her final approach for landing. Condenser-
Discharge Sequential Flashing Lights/Sequenced
Flashing Lights may be installed in conjunction with
the ALS at some airports. Types of Approach Light
Systems are:
1.
ALSF-1
−
Approach Light System with
Sequenced Flashing Lights in ILS Cat-I configura-
tion.
2.
ALSF-2
−
Approach Light System with
Sequenced Flashing Lights in ILS Cat-II configura-
tion. The ALSF-2 may operate as an SSALR when
weather conditions permit.
3.
SSALF
−
Simplified Short Approach Light
System with Sequenced Flashing Lights.
4.
SSALR
−
Simplified Short Approach Light
System with Runway Alignment Indicator Lights.
5.
MALSF
−
Medium Intensity Approach Light
System with Sequenced Flashing Lights.
6.
MALSR
−
Medium Intensity Approach Light
System with Runway Alignment Indicator Lights.
PCG A
−
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