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of a total system are ILS/MLS, radar, communications,
ATC procedures, and required airborne
equipment. The Approach Procedure Chart permitting
simultaneous parallel ILS/MLS approaches will
contain the note “simultaneous approaches authorized
RWYS 14L and 14R,” identifying the appropriate
runways as the case may be. When advised that
simultaneous parallel ILS/MLS approaches are in
progress, pilots shall advise approach control
immediately of malfunctioning or inoperative
receivers, or if a simultaneous parallel ILS/MLS
approach is not desired.
AIM 8/5/04
5−4−34 Arrival Procedures
b. Radar Monitoring. This service is provided
for each simultaneous parallel ILS/MLS approach to
ensure aircraft do not deviate from the final approach
course. Radar monitoring includes instructions if an
aircraft nears or penetrates the prescribed NTZ (an
area 2,000 feet wide located equidistant between
parallel final approach courses). This service will be
provided as follows:
1. During turn on to parallel final approach,
aircraft will be provided 3 miles radar separation or
a minimum of 1,000 feet vertical separation. Aircraft
will not be vectored to intercept the final approach
course at an angle greater than thirty degrees.
2. The final monitor controller will have the
capability of overriding the tower controller on the
tower frequency.
3. Pilots will be instructed to monitor the tower
frequency to receive advisories and instructions.
4. Aircraft observed to overshoot the turn-on or
to continue on a track which will penetrate the NTZ
will be instructed to return to the correct final
approach course immediately. The final monitor
controller may also issue missed approach or
breakout instructions to the deviating aircraft.
PHRASEOLOGY−
“(Aircraft call sign) YOU HAVE CROSSED THE FINAL
APPROACH COURSE. TURN (left/right) IMMEDIATELY
AND RETURN TO THE LOCALIZER/AZIMUTH
COURSE,”
or
“(aircraft call sign) TURN (left/right) AND RETURN TO
THE LOCALIZER/AZIMUTH COURSE.”
5. If a deviating aircraft fails to respond to such
instructions or is observed penetrating the NTZ, the
aircraft on the adjacent final approach course may be
instructed to alter course.
PHRASEOLOGY−
“TRAFFIC ALERT (aircraft call sign) TURN (left/right)
IMMEDIATELY HEADING (degrees), (climb/descend)
AND MAINTAIN (altitude).”
6. Radar monitoring will automatically be
terminated when visual separation is applied, the
aircraft reports the approach lights or runway in sight,
or the aircraft is 1 mile or less from the runway
threshold (for runway centerlines spaced 4,300 feet
or greater). Final monitor controllers will not advise
pilots when radar monitoring is terminated.
2/17/05 AIM
Arrival Procedures 5−4−35
5−4−16. Simultaneous Close Parallel ILS PRM Approaches (Independent) and
Simultaneous Offset Instrument Approaches (SOIA) (See FIG 5−4−18.)
FIG 5−4−18
ILS PRM Approaches
(Simultaneous Close Parallel)
a. System.
1. ILS/PRM is an acronym for Instrument
Landing System/Precision Runway Monitor.
(a) An approach system that permits simultaneous
ILS/PRM approaches to dual runways with
centerlines separated by less than 4,300 feet but at
least 3,400 feet for parallel approach courses, and at
least 3,000 feet if one ILS if offset by 2.5 to
3.0 degrees. The airspace between the final approach
courses contains a No Transgression Zone (NTZ)
with surveillance provided by two PRM monitor
controllers, one for each approach course. To qualify
for reduced lateral runway separation, monitor controllers
must be equipped with high update radar and
high resolution ATC radar displays, collectively
called a PRM system. The PRM system displays
almost instantaneous radar information. Automated
tracking software provides PRM monitor controllers
with aircraft identification, position, speed and a
ten−second projected position, as well as visual and
aural controller alerts. The PRM system is a supplemental
requirement for simultaneous close parallel
approaches in addition to the system requirements for
AIM 2/17/05
5−4−36 Arrival Procedures
simultaneous parallel ILS/MLS approaches described
in paragraph 5−4−15, Simultaneous Parallel
ILS/MLS Approaches (Independent).
(b) Simultaneous close parallel ILS/PRM
approaches are depicted on a separate Approach
Procedure Chart titled ILS/PRM Rwy XXX
(Simultaneous Close Parallel).
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