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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.

or both sides of centerline
Arrow indicates direction of route
See MTR tabulation for altitude range information
All IR and VR MTRs are shown except those VRs at or bleow 1500’ AGL
CAUTION: Inset charts do not depict MTRs
Alaska Capstone Routes (R Routes)
”R” Routes (R2010, R2015, R2020, R2025) are RNP 1 Navigation Specification. Users must have specific FAA authorization, through Operations Specification or Letter of Authorization, obtained from Flight Standards to use these routes. The aircraft’s lateral deviation display scaling must support the RNP 1 Enroute operation.
FAA aeronautical chart visual associated with “Alaska Capstone R Route (RNP route)” (source page 81).
Alaska Capstone R Route (RNP route) — source page 81.
AIRSPACE INFORMATION Airway/Route Types Low and High Enroute Airway Data: Low Enroute Charts Victor Airways LF/MF Airway RNAV T Route GNSS Required RNAV TK Helicopter Route GNSS Required Preferred Direction Victor Route $V0 Unusable Route Segment Military Training Routes (MTR) MTRs 5NM or less both sides of centerline MTRs greater than 5NM either or both sides of centerline Arrow indicates direction of route See MTR tabulation for altitude range information All IR and VR MTRs are shown except those VRs at or bleow 1500’ AGL CAUTION: Inset charts do not depict MTRs Alaska Capstone Routes (R Routes) ”R” Routes (R2010, R2015, R2020, R2025) are RNP 1 Navigation Specification. Users must have specific FAA authorization, through Operations Specification or Letter of Authorization, obtained from Flight Standards to use these routes. The aircraft’s lateral deviation display scaling must support the RNP 1 Enroute operation. Low and High Enroute Charts ATS Route Oceanic Route VHF/UHF Data is depicted in Black. LF/MF Data is depicted in Brown. RNAV Route data is depicted in Blue High Enroute Charts Jet Routes Atlantic Routes Bahama Routes RNAV Q Routes Alaska Q Routes require GNSS and radar surveillance. Within the CONUS, GNSS or DME/DME/IRU RNAV required, unless otherwise indicated. DME/DME/IRU aircraft require radar surveillance. Preferred Direction Jet Routes Preferred Direction RNAV Q Routes Preferred Direction ATS Route Unusable Route Segment Substitute Route All relative and supporting data See NOTAMs or appropriate shown in brown. publication for specific information.
Source page 82

Airspace Information (Continued)

FAA aeronautical chart visual associated with “Compulsory position reporting fix — VHF/UHF” (source page 82).
Compulsory position reporting fix — VHF/UHF — source page 82.
FAA aeronautical chart visual associated with “Compulsory position reporting fix — LF/MF” (source page 82).
Compulsory position reporting fix — LF/MF — source page 82.
FAA aeronautical chart visual associated with “Non-compulsory position reporting fix — VHF/UHF” (source page 82).
Non-compulsory position reporting fix — VHF/UHF — source page 82.
FAA aeronautical chart visual associated with “Non-compulsory position reporting fix — LF/MF” (source page 82).
Non-compulsory position reporting fix — LF/MF — source page 82.
FAA aeronautical chart visual associated with “VHF/UHF fix or waypoint coordinates” (source page 82).
VHF/UHF fix or waypoint coordinates — source page 82.
FAA aeronautical chart visual associated with “LF/MF fix or waypoint coordinates” (source page 82).
LF/MF fix or waypoint coordinates — source page 82.
FAA aeronautical chart visual associated with “Offset arrow showing facility forming a VHF/UHF fix” (source page 82).
Offset arrow showing facility forming a VHF/UHF fix — source page 82.
FAA aeronautical chart visual associated with “Offset arrow showing facility forming an LF/MF fix” (source page 82).
Offset arrow showing facility forming an LF/MF fix — source page 82.
FAA aeronautical chart visual associated with “Distance Measuring Equipment (DME) fix — VHF/UHF” (source page 82).
Distance Measuring Equipment (DME) fix — VHF/UHF — source page 82.