AIM

4/3/14

5−4−42

Arrival Procedures

5

−

4

−

16. Simultaneous Close Parallel ILS/RNAV/GLS PRM Approaches (Independent) and

Simultaneous Offset Instrument Approaches (SOIA)

(See FIG 5−4−22.)

FIG 5

−4−22

PRM Approaches

(Simultaneous Close Parallel)

a. System.

1.

A Precision Runway Monitor (PRM) is a no

transgression zone (NTZ) radar monitoring system

that is required to conduct closely spaced simultan-

eous PRM approaches to parallel runways with

centerlines separated by less than 3,600 feet but at

least 3,400 feet for parallel approach courses, and at

least 3,000 feet if one approach course is offset by 2.5

to 3.0 degrees. The NTZ is monitored by two PRM

monitor controllers, one for each approach course.

The PRM system provides high resolution ATC radar

displays, automated aircraft tracking software, which

provides aircraft identification, position, speed and a

ten-second projected position, as well as visual and

aural controller alerts. Simultaneous close parallel

approaches below 3,600 feet require the PRM system

to supplement requirements for simultaneous parallel

approaches described in Paragraph 5−4−15, Simul-

taneous Parallel ILS/RNAV/GLS Approaches

(Independent).

(a)

RNAV and GLS PRM approaches utilize

the same applicable notations and the same fixes,

crossing altitudes, and missed approach procedures

as the ILS PRM or LDA PRM approach it overlays.

Vertical guidance for an RNAV or GLS PRM ap-

proach must be used when substituting for an ILS

PRM or LDA PRM approach.

(b)

RNAV and GLS PRM approaches may be

substituted for:

(1)

one or both of the ILS PRM approaches

in a simultaneous close parallel operation, or