On 29 March 2023 CAA revoked this AC because the content has been included in AC91-21 - Operational Approvals - Performance-Based Navigation. AC91-21 provides updated guidance on acceptable methods of compliance with the requirements of rule 91.263, and the associated CAA Notices that have been issued in accordance with this rule part.
For more information, see CAA Notices and Performance-Based Navigation (PBN).