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AIM 

6/17/21 

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15.  Simultaneous Independent ILS/RNAV/GLS Approaches 

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Simultaneous Independent ILS/RNAV/GLS Approaches 

a.  System. 

An approach system permitting si-

multaneous approaches to parallel runways with 
centerlines separated by at least 4,300 feet. 
Separation between 4,300 and 9,000 feet (9,200’ for 
airports above 5,000’) utilizing NTZ final monitor 
controllers. Simultaneous independent approaches 
require NTZ radar monitoring to ensure separation 
between aircraft on the adjacent parallel approach 
course. Aircraft position is tracked by final monitor 
controllers who will issue instructions to aircraft 
observed deviating from the assigned final approach 
course. Staggered radar separation procedures are not 
utilized. Integral parts of a total system are radar, 
communications, ATC procedures, and ILS or other 
required airborne equipment. A chart note identifies 
that the approach is authorized for simultaneous use. 

When simultaneous operations are in use, it will be 

advertised on the ATIS. When advised that simulta-
neous approaches are in use, pilots must advise 
approach control immediately of malfunctioning or 
inoperative receivers, or if a simultaneous approach 
is not desired. Although non

precision minimums 

may be published, pilots must only use those proce-
dures specifically authorized by chart note. For 
example, the chart note “LNAV NA during simulta-
neous operations,” requires vertical guidance. When 
given a choice, pilots should always fly a precision 
approach whenever possible. 

NOTE

 

ATC does not use the word independent or parallel when 
advertising these operations on the ATIS. 

EXAMPLE

 

Simultaneous ILS Runway 24 left and ILS Runway 24 right 
approaches in use. 

Arrival Procedures 

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