# The Air Navigation (General) (Amendment) Regulations 1997, Regulation 2


The Air Navigation (General) Regulations 1993 shall be amended as follows:
(1) After regulation 18(1) there shall be inserted the following:
“(1A) For the purposes of article 42(2) of the Air Navigation (No. 2) Order 1995, the following height keeping performance capability is hereby prescribed, that is to say, a capability to ensure that:
(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); and
(b) (i) 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;
(ii) 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.”
(2) In regulation 18(2), for “from flight level 275 to flight level 400” there shall be substituted “from flight level 285 to flight level 420”.

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Source: https://www.legislation.gov.uk/uksi/1997/881/regulation/2 (the official version)
Page: https://openlegislation.uk/air-navigation-general-amendment-regulations-1997/regulation-2
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.