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Aeronautical Chart Users’ Guide

FAA Chart Users’ Guide Version 9 July 2026
All Library Documents

IFR Enroute Low/High Altitude Symbols

IFR low- and high-altitude enroute chart legends, symbols, examples, and procedures.

FAA aeronautical chart visual associated with “Low-enroute TACAN — Santa Rosa / part-time Pensacola” (source page 79).
Low-enroute TACAN — Santa Rosa / part-time Pensacola — source page 79.
TACAN Channels are without
voice but not underlined
Part Time NAVAID
FAA aeronautical chart visual associated with “Low-enroute VORTAC — Alexandria / shutdown Brunswick” (source page 79).
Low-enroute VORTAC — Alexandria / shutdown Brunswick — source page 79.
Shutdown status
FAA aeronautical chart visual associated with “Low-enroute DME — Moultrie 25 MGR (108.8)” (source page 79).
Low-enroute DME — Moultrie 25 MGR (108.8) — source page 79.
DME Channel, Ident, Morse Code,
VHF Frequency

NDB

FAA aeronautical chart visual associated with “Low-enroute NDB — Silver Bay ASOS/AWOS / shutdown Shemya” (source page 79).
Low-enroute NDB — Silver Bay ASOS/AWOS / shutdown Shemya — source page 79.
A - ASOS/AWOS Available
Shutdown status
FAA aeronautical chart visual associated with “Low-enroute NDB/DME — Cape Lisburne no-voice/Y-mode / Iliamna shadow” (source page 79).
Low-enroute NDB/DME — Cape Lisburne no-voice/Y-mode / Iliamna shadow — source page 79.
No Voice Communications
(Y) Mode DME
(AK only) Shadow NAVAID Box
FSS Associated with NAVAID

VOR/DME

FAA aeronautical chart visual associated with “High-enroute VOR/DME — off-route Ithaca, Elmira Y-mode, Mirabel shadow” (source page 79).
High-enroute VOR/DME — off-route Ithaca, Elmira Y-mode, Mirabel shadow — source page 79.