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Aeronautical Chart Users’ Guide

FAA Chart Users’ Guide Version 9 July 2026
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IFR Enroute Low/High Altitude Symbols

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

FAA aeronautical chart visual associated with “MCA — OSITY on V330, 9,500 eastbound from Idaho Falls VOR-DME” (source page 85).
MCA — OSITY on V330, 9,500 eastbound from Idaho Falls VOR-DME — source page 85.
V21 and V257 - MCA at DBS of 8600’ traveling North
V298 - MCA at DBS of 9800’ traveling West
V343 - MCA at DBS of 8500’ traveling North
V520 - MCA at DBS of 9000’ traveling East
V520 - MCA at DBS of 10600’ traveling West
MCA at SABAT on V298 of 11,100 traveling East.
MRA at SABAT of 10000.
Traveling East from DBS, MEA 13,000’ the first two segments, 15,000 along third segment.
Traveling West from QUIRT, MEA of 15,000’ the first segment, MEA of 10,000 the second segment and MEA of 9,000 the third segment.
MOCA for DBS to SABAT and SABAT to LAMON segments of 8100
MCA at OSITY on V330. MCA of 9500’ traveling East on V330 from Idaho Falls (IDA) VOR-DME.
Enroute Chart Examples Low Enroute Chart (Continued) Reference Number 1 2 3 4 Description Multiple MCAs at a NAVAID V21 and V257 - MCA at DBS of 8600’ traveling North V298 - MCA at DBS of 9800’ traveling West V343 - MCA at DBS of 8500’ traveling North V520 - MCA at DBS of 9000’ traveling East V520 - MCA at DBS of 10600’ traveling West MCA and MRA at a Fix MCA at SABAT on V298 of 11,100 traveling East. MRA at SABAT of 10000. Example of MOCA and directional MEAs along a Victor Route Traveling East from DBS, MEA 13,000’ the first two segments, 15,000 along third segment. Traveling West from QUIRT, MEA of 15,000’ the first segment, MEA of 10,000 the second segment and MEA of 9,000 the third segment. MOCA for DBS to SABAT and SABAT to LAMON segments of 8100 MCA Example MCA at OSITY on V330. MCA of 9500’ traveling East on V330 from Idaho Falls (IDA) VOR-DME. AIRSPACE INFORMATION (Continued)
Source page 86

AIRSPACE INFORMATION (Continued)

Enroute Chart Examples

FAA aeronautical chart visual associated with “MEA VHF/RNAV — V465 with 15,000 VHF MEA, 13,300G RNAV MEA/MOCA, MEA gap” (source page 86).
MEA VHF/RNAV — V465 with 15,000 VHF MEA, 13,300G RNAV MEA/MOCA, MEA gap — source page 86.
FAA aeronautical chart visual associated with “MCA/MTA at Jackson (JAC) NAVAID” (source page 86).
MCA/MTA at Jackson (JAC) NAVAID — source page 86.
MEA for aircraft utilizing VHF NAVAID of 15000’
MEA for aircraft utilizing RNAV of 13300’