• The North Atlantic (NAT) is the busiest of all oceanic airspace; direct pilot-controller communication is limited and radar surveillance is generally unavailable. Flight within NAT HLA airspace is only available with the required approval.

    The exact dimensions of the NAT HLA airspace are stated within the Air Navigation (General) Regulations, Part 6.

    The ICAO North Atlantic Operation Manual provides the best source of guidance and information for those planning operations in NAT hla airspace.

    Applying for NAT HLA Approval- AOC holders

    Completed CAA Form CA 4040 should be sent to the CAA Shared Services Centre. At present, no charge is made for NAT HLA Approval for AOC holders. Applicants should also inform their assigned Flight Operations Inspector.

    Applying for NAT HLA Approval - Non-AOC Holders

    Completed CAA Form CA 4040, together with the appropriate fee, should be sent to the CAA Shared Services Centre. Details of costs can be found in the CAA Scheme of Charges - General Aviation.

    CAA Gateway Contact

    CAA Shared Services Centre (Navigation)
    Telephone: +44 (0) 1293 573744

  • Related Information

    The  ICAO Website contains information on the North Atlantic High Level Airspace. Follow the links to NAT Docs for: