{
  "url": "https://openlegislation.uk/air-navigation-general-regulations-2006/regulation-16",
  "json_url": "https://openlegislation.uk/air-navigation-general-regulations-2006/regulation-16.json",
  "legislation": "uksi/2006/601",
  "legislation_title": "The Air Navigation (General) Regulations 2006",
  "legislation_url": "https://openlegislation.uk/air-navigation-general-regulations-2006",
  "path": "regulation/16",
  "kind": "regulation",
  "number": "16",
  "heading": "Minimum navigation performance and height keeping specifications",
  "text": "(1) For the purposes of article 56(1) the following navigation performance capability is prescribed, that is to say, a capability to ensure that—\n(a) the standard deviation of lateral errors in the track of the aircraft is not more than 6.3 nautical miles;\n(b) the proportion of the flight time of the aircraft during which the actual track of the aircraft is 30 nautical miles or more off the track along which it has been given an air traffic control clearance to fly is less than 5.3 × 10-4, and;\n(c) the proportion of the flight time of the aircraft during which the actual track of the aircraft is between 50 and 70 nautical miles off the track along which it has been given an air traffic control clearance to fly is less than 13 × 10-5.\n(2) For the purposes of article 57(1), the following height keeping performance capability is prescribed, that is to say, a capability to ensure that—\n(a) altimetry system error shall be in compliance with paragraph 2.1.1(2) of Document 7030/4-NAT Part 1 Rules of the Air, Air Traffic Services and Search and Rescue (ICAO Regional Procedures, Fourth Edition–1987);\n(b) in respect of aircraft first registered in a Contracting State on or after 1st January 1997 altitude can be automatically controlled within a tolerance band of + / − 65 feet; and\n(c) in respect of aircraft first registered in a Contracting State before 1st January 1997 altitude can be automatically controlled within a tolerance band of + / − 130 feet.",
  "extent": null,
  "status": null,
  "version": "current",
  "annotations": [],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/uksi/2006/601/regulation/16",
    "retrieved_at": "2026-10-29T04:35:35.245903+00:00"
  },
  "licence": "Open Government Licence v3.0",
  "licence_url": "https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/",
  "attribution": "Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives."
}