{"abstract":"This notice announces the availability of, and requests comment on proposed Technical Standard Order (TSO) C-59a, Airborne Selective Calling (SELCAL) Equipment. This proposed TSO tells persons seeking a TSO authorization or letter of design approval what minimum performance standards (MPS) their SELCAL must meet to be identified with the appropriate TSO marking.","action":"Notice of availability and request for public comment.","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/2005/04/18/05-7619.html","cfr_references":[],"citation":"70 FR 20202","comment_url":null,"comments_close_on":"2005-05-18","correction_of":null,"corrections":[],"dates":"Comments must be received on or before May 18, 2005.","disposition_notes":null,"docket_ids":[],"dockets":[],"document_number":"05-7619","effective_on":null,"end_page":20202,"executive_order_notes":null,"executive_order_number":null,"explanation":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2005/04/18/05-7619.xml","html_url":"https://www.federalregister.gov/documents/2005/04/18/05-7619/airborne-selective-calling-equipment","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/05-7619?publication_date=2005-04-18","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2005-04-18/05-7619/mods.xml","not_received_for_publication":null,"page_length":1,"page_views":{"count":89,"last_updated":"2026-04-04 18:15:03 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2005-04-18/pdf/05-7619.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":null,"publication_date":"2005-04-18","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2005/04/18/05-7619.txt","regulation_id_number_info":{},"regulation_id_numbers":[],"regulations_dot_gov_info":{"checked_regulationsdotgov_at":"2011-11-12T15:56:07Z"},"regulations_dot_gov_url":null,"significant":null,"signing_date":null,"start_page":20202,"subtype":null,"title":"Airborne Selective Calling Equipment","toc_doc":"Airborne Selective Calling Equipment","toc_subject":"Technical standard orders:","topics":[],"type":"Notice","volume":70}