{"data":{"id":"us/14-cfr-171.321","jurisdiction":"us","citation":"14 CFR 171.321","heading":"DME and marker beacon performance requirements.","body":"(a) The DME equipment must meet the performance requirements prescribed in subpart G of the part. This subpart imposes requirements that performance features must comply with International Standards and Recommended Practices, Aeronautical Telecommunications, Vol. I of Annex 10 to ICAO. It is available from ICAO, Aviation Building, 1080 University Street, Montreal 101, Quebec, Canada, Attention: Distribution Officer and also available for inspection at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, call 202-741-6030, or go to: http://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html.\n(b) MLS marker beacon equipment must meet the performance requirements prescribed in subpart H of this part. This subpart imposes requirements that performance features must comply with International Standards and Recommended Practices, Aeronautical Telecommuncations, Vol. I of Annex 10 to ICAO.","path":["Title 14—Aeronautics and Space","CHAPTER I—FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION","SUBCHAPTER J—NAVIGATIONAL FACILITIES","PART 171—NON-FEDERAL NAVIGATION FACILITIES","Subpart J—Microwave Landing System (MLS)"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-14.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:24:20Z","sha256":"f2f6587809de96f6b875856be5f0cad03f428de97f32ba6a010c1c152f5e968e","source_id":"us-cfr","stale":true,"prev":"us/14-cfr-171.319","next":"us/14-cfr-171.323"},"notice":"GroundRules: Original legal text. Not legal advice."}