Pilot/Controller Glossary

AREA NAVIGATION (RNAV) APPROACH
CONFIGURATION:
a. STANDARD T- An RNAV approach whose
design allows direct flight to any one of three initial
approach fixes (IAF) and eliminates the need for
procedure turns. The standard design is to align the
procedure on the extended centerline with the missed
approach point (MAP) at the runway threshold, the
final approach fix (FAF), and the initial approach/
intermediate fix (IAF/IF). The other two IAFs will be
established perpendicular to the IF.
b. MODIFIED T- An RNAV approach design for
single or multiple runways where terrain or
operational constraints do not allow for the standard
T. The "T" may be modified by increasing or
decreasing the angle from the corner IAF(s) to the IF
or by eliminating one or both corner IAFs.
c. STANDARD I- An RNAV approach design for
a single runway with both corner IAFs eliminated.
Course reversal or radar vectoring may be required at
busy terminals with multiple runways.
d. TERMINAL ARRIVAL AREA (TAA)- The
TAA is controlled airspace established in conjunction
with the Standard or Modified T and I RNAV
approach configurations. In the standard TAA, there
are three areas: straight-in, left base, and right base.
The arc boundaries of the three areas of the TAA are
published portions of the approach and allow aircraft
to transition from the en route structure direct to the
nearest IAF. TAAs will also eliminate or reduce
feeder routes, departure extensions, and procedure
turns or course reversal.
1. STRAIGHT-IN AREA- A 30NM arc
centered on the IF bounded by a straight line
extending through the IF perpendicular to the
intermediate course.
2. LEFT BASE AREA- A 30NM arc centered
on the right corner IAF. The area shares a boundary
with the straight-in area except that it extends out for
30NM from the IAF and is bounded on the other side
by a line extending from the IF through the FAF to the
arc.
3. RIGHT BASE AREA- A 30NM arc centered
on the left corner IAF. The area shares a boundary
with the straight-in area except that it extends out for
30NM from the IAF and is bounded on the other side
by a line extending from the IF through the FAF to the
arc.

AREA NAVI GATION (R NAV) G L O B A L
POSITIONING SYSTEM (GPS) PRECISION
RUNWAY MONITORING (PRM) APPROACH"
A GPS approach, which requires vertical guidance,
used in lieu of an ILS PRM approach to conduct
approaches to parallel runways whose extended
centerlines are separated by less than 4,300 feet and
at least 3,000 feet, where simultaneous close parallel
approaches are permitted. Also used in lieu of an ILS
PRM and/or LDA PRM approach to conduct
Simultaneous Offset Instrument Approach (SOIA)
operations.
ARINC- An acronym for Aeronautical Radio, Inc.,
a corporation largely owned by a group of airlines.
ARINC is licensed by the FCC as an aeronautical
station and contracted by the FAA to provide
communications support for air traffic control and
meteorological services in portions of international
airspace.
ARMY AVIATION FLIGHT INFORMATION
BULLETIN- A bulletin that provides air operation
data covering Army, National Guard, and Army
Reserve aviation activities.
ARO-
(See AIRPORT RESERVATION OFFICE.)

ARRESTING SYSTEM- A safety device consisting
of two major components, namely, engaging or
catching devices and energy absorption devices for
the purpose of arresting both tailhook and/or
nontailhook-equipped aircraft. It is used to prevent
aircraft from overrunning runways when the aircraft
cannot be stopped after landing or during aborted
takeoff. Arresting systems have various names; e.g.,
arresting gear, hook device, wire barrier cable.
(See ABORT.)
(Refer to AIM.)

ARRIVAL AIRCRAFT INTERVAL- An internally
generated program in hundredths of minutes based
upon the AAR. AAI is the desired optimum interval
between successive arrival aircraft over the vertex.
ARRIVAL CENTER- The ARTCC having jurisdiction for the impacted airport.
ARRIVAL DELAY- A parameter which specifies a
period of time in which no aircraft will be metered for
arrival at the specified airport.
ARRIVAL SECTOR- An operational control sector
containing one or more meter fixes.
ARRIVAL SECTOR ADVISORY LIST- An
ordered list of data on arrivals displayed at the