Pilot/Controller Glossary

PRIMARY RADAR TARGET- An analog or digital target, exclusive of a secondary radar target, presented on
a radar display.
PRM-
(See AREA NAVIGATION (RNAV) GLOBAL POSITIONING SYSTEM (GPS) PRECISION RUNWAY
MONITORING (PRM) APPROACH.)
(See PRM APPROACH.)
(See PRECISION RUNWAY MONITOR SYSTEM.)

PRM APPROACH- An instrument approach procedure titled ILS PRM, RNAV PRM, LDA PRM, or GLS PRM
conducted to parallel runways separated by less than 4,300 feet and at least 3,000 feet where independent closely
spaced approaches are permitted. Use of an enhanced display with alerting, a No Transgression Zone (NTZ),
secondary monitor frequency, pilot PRM training, and publication of an Attention All Users Page are required
for all PRM approaches. Depending on the runway spacing, the approach courses may be parallel or one
approach course must be offset. PRM procedures are also used to conduct Simultaneous Offset Instrument
Approach (SOIA) operations. In SOIA, one straight-in ILS PRM, RNAV PRM, GLS PRM, and one offset LDA
PRM, RNAV PRM or GLS PRM approach are utilized. PRM procedures are terminated and a visual segment
begins at the offset approach missed approach point where the minimum distance between the approach courses
is 3000 feet. Runway spacing can be as close as 750 feet.
(Refer to AIM.)

PROCEDURAL CONTROL [ICAO]" Term used to indicate that information derived from an ATS surveillance
system is not required for the provision of air traffic control service.
PROCEDURAL SEPARATION [ICAO]" The separation used when providing procedural control.
PROCEDURE TURN- The maneuver prescribed when it is necessary to reverse direction to establish an aircraft
on the intermediate approach segment or final approach course. The outbound course, direction of turn, distance
within which the turn must be completed, and minimum altitude are specified in the procedure. However, unless
otherwise restricted, the point at which the turn may be commenced and the type and rate of turn are left to the
discretion of the pilot.
(See ICAO term PROCEDURE TURN.)

PROCEDURE TURN [ICAO]- A maneuver in which a turn is made away from a designated track followed by
a turn in the opposite direction to permit the aircraft to intercept and proceed along the reciprocal of the
designated track.
Note 1: Procedure turns are designated "left" or "right" according to the direction of the initial turn.
Note 2: Procedure turns may be designated as being made either in level flight or while descending, according
to the circumstances of each individual approach procedure.

PROCEDURE TURN INBOUND- That point of a procedure turn maneuver where course reversal has been
completed and an aircraft is established inbound on the intermediate approach segment or final approach course.
A report of "procedure turn inbound" is normally used by ATC as a position report for separation purposes.
(See FINAL APPROACH COURSE.)
(See PROCEDURE TURN.)
(See SEGMENTS OF AN INSTRUMENT APPROACH PROCEDURE.)

PROFILE DESCENT- An uninterrupted descent (except where level flight is required for speed adjustment;
e.g., 250 knots at 10,000 feet MSL) from cruising altitude/level to interception of a glideslope or to a minimum
altitude specified for the initial or intermediate approach segment of a nonprecision instrument approach. The
profile descent normally terminates at the approach gate or where the glideslope or other appropriate minimum
altitude is intercepted.
PROGRESS REPORT-
(See POSITION REPORT.)

PROGRESSIVE TAXI- Precise taxi instructions given to a pilot unfamiliar with the airport or issued in stages
as the aircraft proceeds along the taxi route.