background image

6/17/21 

AIM 

conduct operations on those routes in accordance 
with FAA operations specifications. 

2. 

The jet route system consists of jet routes 

established from 18,000 feet MSL to FL 450 
inclusive. 

(a) 

These routes are depicted on Enroute 

High Altitude Charts. Jet routes are depicted in black 
on aeronautical charts and are identified by a “J” (Jet) 
followed by the airway number (e.g., J12). Jet routes, 
as VOR airways, are predicated solely on VOR or 
VORTAC navigation facilities (except in Alaska). 

NOTE

 

Segments of jet routes in Alaska are based on L/MF 
navigation aids and are charted in brown color instead of 
black on en route charts. 

(b) 

With respect to position reporting, 

reporting points are designated for jet route systems. 
Flights using jet routes will report over these points 
unless otherwise advised by ATC. 

3.  Area Navigation (RNAV) Routes. 

(a) 

Published RNAV routes, including 

Q

Routes and T

Routes, can be flight planned for 

use by aircraft with RNAV capability, subject to any 
limitations or requirements noted on en route charts, 
in applicable Advisory Circulars, or by NOTAM. 
RNAV routes are depicted in blue on aeronautical 
charts and are identified by the letter “Q” or “T” 
followed by the airway number (for example, Q

13, 

T

205). Published RNAV routes are RNAV

2 except 

when specifically charted as RNAV

1. These routes 

require system performance currently met by GPS, 
GPS/WAAS, or DME/DME/IRU RNAV systems that 
satisfy the criteria discussed in AC 90

100A, U.S. 

Terminal and En Route Area Navigation (RNAV) 
Operations. 

(1) 

Q

routes are available for use by RNAV 

equipped aircraft between 18,000 feet MSL and 
FL 450 inclusive. Q

routes are depicted on Enroute 

High Altitude Charts. 

NOTE

 

Aircraft in Alaska may only operate on GNSS Q-routes 
with GPS (TSO-C129 (as revised) or TSO-C196 (as 
revised)) equipment while the aircraft remains in Air 
Traffic Control (ATC) radar surveillance or with 
GPS/WAAS which does not require ATC radar surveil-
lance. 

(2) 

T

routes are available for use by GPS or 

GPS/WAAS equipped aircraft from 1,200 feet above 

the surface (or in some instances higher) up to but not 
including 18,000 feet MSL. T

routes are depicted on 

Enroute Low Altitude Charts. 

NOTE

 

Aircraft in Alaska may only operate on GNSS T-routes 
with GPS/WAAS (TSO-C145 (as revised) or TSO-C146 (as 
revised)) equipment. 

(b) 

Unpublished RNAV routes are direct 

routes, based on area navigation capability, between 
waypoints defined in terms of latitude/longitude 
coordinates, degree

distance fixes, or offsets from 

established routes/airways at a specified distance and 
direction. Radar monitoring by ATC is required on all 
unpublished RNAV routes, except for GNSS

 

equipped aircraft cleared via filed published 
waypoints recallable from the aircraft’s navigation 
database. 

(c) 

Magnetic Reference Bearing (MRB) is the 

published bearing between two waypoints on an 
RNAV/GPS/GNSS route. The MRB is calculated by 
applying magnetic variation at the waypoint to the 
calculated true course between two waypoints. The 
MRB enhances situational awareness by indicating a 
reference bearing (no

wind heading) that a pilot 

should see on the compass/HSI/RMI, etc., when 
turning prior to/over a waypoint en route to another 
waypoint. Pilots should use this bearing as a reference 
only, because their RNAV/GPS/GNSS navigation 
system will fly the true course between the 
waypoints. 

b. 

Operation above FL 450 may be conducted on 

a point-to-point basis. Navigational guidance is 
provided on an area basis utilizing those facilities 
depicted on the enroute high altitude charts. 

c.  Radar Vectors. 

Controllers may vector air-

craft within controlled airspace for separation 
purposes, noise abatement considerations, when an 
operational advantage will be realized by the pilot or 
the controller, or when requested by the pilot. Vectors 
outside of controlled airspace will be provided only 
on pilot request. Pilots will be advised as to what the 
vector is to achieve when the vector is controller 
initiated and will take the aircraft off a previously 
assigned nonradar route. To the extent possible, 
aircraft operating on RNAV routes will be allowed to 
remain on their own navigation. 

d. 

When flying in Canadian airspace, pilots are 

cautioned to review Canadian Air Regulations. 

En Route Procedures 

5

3

17