{"abstract":"This action proposes to permit Reduced Vertical Separation Minimum (RVSM) flights in the airspace over the contiguous 48 States of the United States (U.S.) and Alaska and that portion of the Gulf of Mexico where the FAA provides air traffic services. The RVSM program would allow the use of reduced vertical separation between aircraft at certain altitudes. This reduction of vertical separation minima would only be applied between those aircraft that meet stringent altimeter and auto-pilot performance requirements. This proposed rule would also require any aircraft that is equipped with Traffic Alert and Collision Avoidance System version II (TCAS II) and flown in RVSM airspace to incorporate a version of TCAS II that is compatible wit RVSM operations. The FAA is proposing this action to enhance airspace capacity and to assist aircraft operators to save fuel and time.","action":"Notice of proposed rulemaking (NPRM).","agencies":[{"raw_name":"DEPARTMENT OF TRANSPORTATION","name":"Transportation Department","id":492,"url":"https://www.federalregister.gov/agencies/transportation-department","json_url":"https://www.federalregister.gov/api/v1/agencies/492","parent_id":null,"slug":"transportation-department"},{"raw_name":"Federal Aviation Administration","name":"Federal Aviation Administration","id":159,"url":"https://www.federalregister.gov/agencies/federal-aviation-administration","json_url":"https://www.federalregister.gov/api/v1/agencies/159","parent_id":492,"slug":"federal-aviation-administration"}],"body_html_url":"https://www.federalregister.gov/documents/full_text/html/2002/05/10/02-11704.html","cfr_references":[{"chapter":null,"citation_url":null,"part":91,"title":14}],"citation":"67 FR 31920","comment_url":null,"comments_close_on":"2002-08-08","correction_of":null,"corrections":[],"dates":"Comments must be submitted on or before August 8, 2002.","disposition_notes":null,"docket_ids":["Docket No. FAA-2002-12261","Notice No. 02-09"],"dockets":[],"document_number":"02-11704","effective_on":null,"end_page":31929,"executive_order_notes":null,"executive_order_number":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2002/05/10/02-11704.xml","html_url":"https://www.federalregister.gov/documents/2002/05/10/02-11704/reduced-vertical-separation-minimum-in-domestic-united-states-airspace","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/02-11704?publication_date=2002-05-10","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2002-05-10/02-11704/mods.xml","not_received_for_publication":null,"page_length":10,"page_views":{"count":245,"last_updated":"2026-09-22 20:15:08 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2002-05-10/pdf/02-11704.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":null,"publication_date":"2002-05-10","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2002/05/10/02-11704.txt","regulation_id_number_info":{"2120-AH63":null},"regulation_id_numbers":["2120-AH63"],"regulations_dot_gov_info":{},"regulations_dot_gov_url":null,"significant":null,"signing_date":null,"start_page":31920,"subtype":null,"title":"Reduced Vertical Separation Minimum in Domestic United States Airspace","toc_doc":null,"toc_subject":null,"topics":["Air traffic control","Aircraft","Airmen","Airports","Aviation safety","Reporting and recordkeeping requirements"],"type":"Proposed Rule","volume":67}