{"abstract":"The Federal Aviation Administration (FAA) intends by this proposed rule to enable the implementation of Reduced Vertical Separation Minimum (RVSM) in Pacific oceanic airspace. RVSM is the reduction of the vertical separation of aircraft from 2,000 feet to 1,000 feet at flight levels (FLs) between FL 290 (29,000 feet) and FL 410 (41,000 feet). RVSM is applied only between aircraft that meet stringent altimeter and auto-pilot performance requirements. RVSM is currently applied only in North Atlantic (NAT) Minimum Navigation Performance Specification (MNPS) airspace. The introduction of RVSM in Pacific oceanic airspace would make more fuel and time efficient flight levels and tracks available to operators and would enhance airspace capacity. Since March 1997 in the North Atlantic, RVSM has been shown to maintain an acceptable level of safety. International RVSM planning groups have agreed to implement RVSM on or before February 24, 2000.","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/1999/07/08/99-17360.html","cfr_references":[{"chapter":null,"citation_url":null,"part":91,"title":14}],"citation":"64 FR 37018","comment_url":null,"comments_close_on":"1999-09-07","correction_of":null,"corrections":[],"dates":"Comments must be submitted on or before September 7, 1999.","disposition_notes":null,"docket_ids":["Docket No. FAA-1999-5925","Notice No. 99-10"],"dockets":[],"document_number":"99-17360","effective_on":null,"end_page":37024,"executive_order_notes":null,"executive_order_number":null,"explanation":null,"full_text_xml_url":null,"html_url":"https://www.federalregister.gov/documents/1999/07/08/99-17360/reduced-vertical-separation-minimum","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/99-17360?publication_date=1999-07-08","mods_url":"https://www.govinfo.gov/metadata/granule/FR-1999-07-08/99-17360/mods.xml","not_received_for_publication":null,"page_length":7,"page_views":{"count":38,"last_updated":"2026-04-03 16:15:03 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-1999-07-08/pdf/99-17360.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":null,"publication_date":"1999-07-08","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/1999/07/08/99-17360.txt","regulation_id_number_info":{"2120-AG82":{"issue":"199910","html_url":"https://www.federalregister.gov/regulations/2120-AG82/reduced-vertical-separation-minimum","title":"Reduced Vertical Separation Minimum","xml_url":"http://www.reginfo.gov/public/do/eAgendaViewRule?pubId=199910&RIN=2120-AG82&operation=OPERATION_EXPORT_XML","priority_category":"Substantive, Nonsignificant"}},"regulation_id_numbers":["2120-AG82"],"regulations_dot_gov_info":{"checked_regulationsdotgov_at":"2011-09-21T06:37:30Z"},"regulations_dot_gov_url":null,"significant":false,"signing_date":null,"start_page":37018,"subtype":null,"title":"Reduced Vertical Separation Minimum","toc_doc":null,"toc_subject":null,"topics":[],"type":"Proposed Rule","volume":64}