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surface.
AIRCRAFT APPROACH CATEGORY- A
grouping of aircraft based on a speed of 1.3 times the
stall speed in the landing configuration at maximum
gross landing weight. An aircraft must fit in only one
category. If it is necessary to maneuver at speeds in
excess of the upper limit of a speed range for a
category, the minimums for the category for that
speed must be used. For example, an aircraft which
falls in Category A, but is circling to land at a speed
in excess of 91 knots, must use the approach
CategoryB minimums when circling to land. The
categories are as follows:
a. Category A- Speed less than 91 knots.
b. Category B- Speed 91 knots or more but less
than 121 knots.
c. Category C- Speed 121 knots or more but less
than 141 knots.
d. Category D- Speed 141 knots or more but less
than 166 knots.
e. Category E- Speed 166 knots or more.
(Refer to 14 CFR Part 97.)
AIRCRAFT CLASSES- For the purposes of Wake
Turbulence Separation Minima, ATC classifies
aircraft as Heavy, Large, and Small as follows:
a. Heavy- Aircraft capable of takeoff weights of
more than 255,000 pounds whether or not they are
operating at this weight during a particular phase of
flight.
b. Large- Aircraft of more than 41,000 pounds,
maximum certificated takeoff weight, up to 255,000
pounds.
c. Small- Aircraft of 41,000 pounds or less
maximum certificated takeoff weight.
(Refer to AIM.)
AIRCRAFT CONFLICT- Predicted conflict, within
URET, of two aircraft, or between aircraft and
airspace. A Red alert is used for conflicts when the
predicted minimum separation is 5 nautical miles or
less. A Yellow alert is used when the predicted
minimum separation is between 5 and approximately
12 nautical miles. A Blue alert is used for conflicts
between an aircraft and predefined airspace.
(See USER REQUEST EVALUATION TOOL.)
AIRCRAFT LIST (ACL)- A view available with
URET that lists aircraft currently in or predicted to be
in a particular sector's airspace. The view contains
textual flight data information in line format and may
be sorted into various orders based on the specific
needs of the sector team.
(See USER REQUEST EVALUATION TOOL.)
AIRCRAFT SURGE LAUNCH AND
RECOVERY- Procedures used at USAF bases to
provide increased launch and recovery rates in
instrument flight rules conditions. ASLAR is based
on:
Pilot/Controller Glossary 7/31/08
2/14/08 Pilot/Controller Glossary
PCG A-7
a. Reduced separation between aircraft which is
based on time or distance. Standard arrival separation
applies between participants including multiple
flights until the DRAG point. The DRAG point is a
published location on an ASLAR approach where
aircraft landing second in a formation slows to a
predetermined airspeed. The DRAG point is the
reference point at which MARSA applies as
expanding elements effect separation within a flight
or between subsequent participating flights.
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.
AIRMEN'S METEOROLOGICAL
INFORMATION-
(See AIRMET.)
AIRMET- In‐flight weather advisories issued only
to amend the 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 turbulence, 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 AWW.)
(See CONVECTIVE SIGMET.)
(See CWA.)
(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
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