Aeronautical Information Manual (AIM), page 372

Index   371 -- Page 372 -- 373

3. If, after repeated advisories, the aircraft
proceeds outside the PAR safety limit or if a radical
deviation is observed, the pilot will be advised to
execute a missed approach unless the prescribed
visual reference with the surface is established.

d. Radar service is automatically terminated upon

completion of the approach.

5-4-13. ILS Approaches to Parallel
a. ATC procedures permit ILS/RNAV/GLS
instrument approach operations to dual or triple
parallel runway configurations. ILS/RNAV/GLS
approaches to parallel runways are grouped into three
classes: Simultaneous Parallel Dependent
Approaches; Simultaneous (Parallel) Independent
Approaches; and Simultaneous Close Parallel PRM
Approaches. (See FIG 5-4-19.) RNAV approach
procedures that are approved for simultaneous
operations require GPS as the sensor for position
updating. VOR/DME, DME/DME and IRU RNAV
updating is not authorized. The classification of a
parallel runway approach procedure is dependent on
adjacent parallel runway centerline separation, ATC
procedures, and airport ATC radar monitoring and
communications capabilities. At some airports one or
more parallel localizer courses may be offset up to 3
degrees. ILS approaches with offset localizer
configurations result in loss of Category II/III
capabilities and an increase in decision
altitude/height (50').
b. Parallel approach operations demand
heightened pilot situational awareness. A thorough
Approach Procedure Chart review should be
conducted with, as a minimum, emphasis on the
following approach chart information: name and
number of the approach, localizer frequency, inbound
localizer/azimuth course, glide slope intercept
altitude, glideslope crossing altitude at the final

approach fix, decision height, missed approach
instructions, special notes/procedures, and the
assigned runway location/proximity to adjacent
runways. Pilots will be advised that simultaneous
dependent approaches, simultaneous approaches, or
simultaneous close parallel PRM approaches are in
use. This information may be provided through the

c. The close proximity of adjacent aircraft
conducting simultaneous (parallel) independent
approaches and simultaneous close parallel PRM
approaches mandates strict pilot compliance with all
ATC clearances. ATC assigned airspeeds, altitudes,
and headings must be complied with in a timely

manner. Autopilot coupled approaches require pilot

knowledge of procedures necessary to comply with
ATC instructions. Simultaneous (parallel)
independent approaches and simultaneous close
parallel PRM approaches necessitate precise
approach course tracking to minimize final monitor
controller intervention, and unwanted No
Transgression Zone (NTZ) penetration. In the
unlikely event of a breakout, ATC will not assign
altitudes lower than the minimum vectoring altitude.
Pilots should notify ATC immediately if there is a
degradation of aircraft or navigation systems.
d. Strict radio discipline is mandatory during
simultaneous (parallel) independent and
simultaneous close parallel PRM approach
operations. This includes an alert listening watch and
the avoidance of lengthy, unnecessary radio
transmissions. Attention must be given to proper call
sign usage to prevent the inadvertent execution of
clearances intended for another aircraft. Use of
abbreviated call signs must be avoided to preclude
confusion of aircraft with similar sounding call signs.
Pilots must be alert to unusually long periods of
silence or any unusual background sounds in their
radio receiver. A stuck microphone may block the
issuance of ATC instructions on the tower frequency
by the final monitor controller during simultaneous
(parallel) independent and simultaneous close
parallel PRM approaches. In the case of PRM
approaches, the use of a second frequency by the
monitor controller mitigates the "stuck mike" or other
blockage on the tower frequency.
AIM, Chapter 4, Section 2, Radio Communications Phraseology and
Techniques, gives additional communications information.

e. Use of Traffic Collision Avoidance Systems
(TCAS) provides an additional element of safety to
parallel approach operations. Pilots should follow
recommended TCAS operating procedures presented
in approved flight manuals, original equipment
manufacturer recommendations, professional
newsletters, and FAA publications.

5-4-36 Arrival Procedures

Page 372 of the Aeronautical Information Manual (AIM.pdf)
AIM: Official Guide to Basic Flight Information and ATC Procedures

Index   371 -- Page 372 -- 373