14 CFR Part 171
75 sections · 10 subparts · Amended 2026-09-15
NON-FEDERAL NAVIGATION FACILITIES
2 Legal Interpretations View on eCFR ↗
Authority49 U.S.C. 106(g), 40103-40107, 40109, 40113, 44502, 44701-44702, 44708-44709, 44711, 44719-44721, 45303, 46308.
SourceDocket 5034, 29 FR 11337, Aug. 6, 1964, unless otherwise noted.
Subpart A— VOR Facilities 7 sections
Subpart B— Nondirectional Radio Beacon Facilities 7 sections
Subpart C— Instrument Landing System (ILS) Facilities 7 sections
Subpart D— True Lights 1 section
Subpart E— General 3 sections
Subpart F— Simplified Directional Facility (SDF) 9 sections
- § 171.101 Scope.
- § 171.103 Requests for IFR procedure.
- § 171.105 Minimum requirements for approval.
- § 171.107 Definition.
- § 171.109 Performance requirements.
- § 171.111 Ground standards and tolerances.
- § 171.113 Installation requirements.
- § 171.115 Maintenance and operations requirements.
- § 171.117 Reports.
Subpart G— Distance Measuring Equipment (DME) 7 sections
Subpart H— VHF Marker Beacons 7 sections
Subpart I— Interim Standard Microwave Landing System (ISMLS) 13 sections
- § 171.251 Scope.
- § 171.253 Definitions.
- § 171.255 Requests for IFR procedures.
- § 171.257 Minimum requirements for approval.
- § 171.259 Performance requirements: General.
- § 171.261 Localizer performance requirements.
- § 171.263 Localizer automatic monitor system.
- § 171.265 Glide path performance requirements.
- § 171.267 Glide path automatic monitor system.
- § 171.269 Marker beacon performance requirements.
- § 171.271 Installation requirements.
- § 171.273 Maintenance and operations requirements.
- § 171.275 Reports.
Subpart J— Microwave Landing System (MLS) 14 sections
- § 171.301 Scope.
- § 171.303 Definitions.
- § 171.305 Requests for IFR procedure.
- § 171.307 Minimum requirements for approval.
- § 171.309 General requirements.
- § 171.311 Signal format requirements.
- § 171.313 Azimuth performance requirements.
- § 171.315 Azimuth monitor system requirements.
- § 171.317 Approach elevation performance requirements.
- § 171.319 Approach elevation monitor system requirements.
- § 171.321 DME and marker beacon performance requirements.
- § 171.323 Fabrication and installation requirements.
- § 171.325 Maintenance and operations requirements.
- § 171.327 Operational records.