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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