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AIM

10/12/17

5

−4−43

Arrival Procedures

5

−4−16. Simultaneous Close Parallel PRM Approaches and Simultaneous Offset Instrument

Approaches (SOIA)

FIG 5

−4−23

PRM Approaches

Simultaneous Close Parallel

a. System.

1.

PRM is an acronym for the high update rate

Precision Runway Monitor surveillance system
which is required to monitor the No Transgression
Zone (NTZ) for specific parallel runway separations
used to conduct simultaneous close parallel ap-
proaches. PRM is also published in the title as part of
the approach name for IAPs used to conduct
Simultaneous Close Parallel approaches. “PRM”
alerts pilots that specific airborne equipment,
training, and procedures are applicable.

Because Simultaneous Close Parallel PRM ap-
proaches are independent, the NTZ and normal
operating zone (NOZ) airspace between the final ap-
proach courses is monitored by two monitor
controllers, one for each approach course. The NTZ
monitoring system (final monitor aid) consists of a
high resolution ATC radar display with automated
tracking software which provides monitor controllers
with aircraft identification, position, speed, and a

ten

−second projected position, as well as visual and

aural NTZ penetration alerts. A PRM high update rate
surveillance sensor is a component of this system on-
ly for specific runway spacing. Additional
procedures for simultaneous independent approaches
are described in Paragraph 5

−4−15, Simultaneous

Independent ILS/RNAV/GLS Approaches.

2.

Simultaneous Close Parallel PRM approach-

es, whether conducted utilizing a high update rate
PRM surveillance sensor or not, must meet all of the
following requirements: pilot training,PRM in the
approach title,NTZ monitoring utilizing a final
monitor aid, radar display, publication of an AAUP,
and use of a secondary PRM communications
frequency. PRM approaches are depicted on a
separate IAP titled (Procedure type) PRM Rwy XXX
(Simultaneous Close Parallel or Close Parallel).

NOTE

ATC does not use the word “independent” when
advertising these operations on the ATIS.

3/29/18

AIM