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6/17/21 

AIM 

b. 

Radar Services. These services are provided for 

each simultaneous independent approach. 

1. 

During turn on to parallel final approach, 

aircraft are normally provided 3 miles radar 
separation or a minimum of 1,000 feet vertical 
separation. The assigned altitude must be maintained 
until intercepting the glidepath, unless cleared 
otherwise by ATC. Aircraft will not be vectored to 
intercept the final approach course at an angle greater 
than thirty degrees. 

NOTE

 

Some simultaneous operations permit the aircraft to track 
an RNAV course beginning on downwind and continuing 
in a turn to intercept the final approach course. In this case, 
separation with the aircraft on the adjacent final approach 
course is provided by the monitor controller with reference 
to an NTZ. 

2. 

The final monitor controller will have the 

capability of overriding the tower controller on the 
tower frequency. 

3. 

Pilots will be instructed to contact the tower 

frequency prior to the point where NTZ monitoring 
begins. 

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 cancel the approach clearance, and 
issue missed approach or other instructions to the 
deviating aircraft. 

PHRASEOLOGY

 

“(Aircraft call sign) YOU HAVE CROSSED THE FINAL 
APPROACH COURSE. TURN (left/right) 
IMMEDIATELY AND RETURN TO THE FINAL 
APPROACH COURSE,” 

or 

“(aircraft call sign) TURN (left/right) AND RETURN TO 
THE FINAL APPROACH 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 (if 
threatened), will be issued a breakout instruction. 

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 NM or less from the runway 
threshold. Final monitor controllers will not advise 
pilots when radar monitoring is terminated. 

NOTE

 

Simultaneous independent approaches conducted to 
runways spaced greater than 9,000 feet (or 9,200’ at 
airports above 5,000’) do not require an NTZ. However, 
from a pilot’s perspective, the same alerts relative to 
deviating aircraft will be provided by ATC as are provided 
when an NTZ is being monitored. Pilots may not be aware 
as to whether or not an NTZ is being monitored. 

Arrival Procedures 

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