North Atlantic high level airspace operations
Approximately three thousand aircraft fly across the North Atlantic (NAT) airspace daily, with approvals to operate in the ICAO NAT Region airspace based on ICAO NAT DOC 007.
In transitioning to performance-based navigation (PBN) requirements in this airspace by 30 January 2020, NAT MNPS was re-designated as the North Atlantic High Level Airspace (NAT HLA).
Aircraft operating in the NAT HLA require a CASA issued navigation authorisation as provided for in instrument 27/16 - expiring on 30 January 2020.
Details of the requirements for these operations are in the North Atlantic HLA Airspace operations manual. The manual permits suitably equipped and authorised aircraft to use SATVOICE in the NAT HLA region.
Operators applying for authorisation to operate in NAT HLA are required to be approved for RNP 10 or RNP 4. In the future, RNP 2 may be introduced into NAT HLA operations. It is currently listed in the ICAO Performance Based Navigation Manual (ICAO Doc 9613) as a navigation specification that can be applied in oceanic operations.
Why do re-issued approvals still refer to MNPS?
Approvals previously issued for NAT MNPS were based on instrument number CASA 80/14 which expired on 31 March 2016.
Re-issued approvals still refer to NAT MNPS as ICAO have recognised that minimum navigation performance specification (MNPS) is referred to in regional supplementary procedures.
How will new approvals be issued?
New approvals will be issued as NAT HLA MNPS approvals.
Authorisation for SATVOICE
For unrestricted operations in the NAT region operators must have fully functioning HF communications equipment. While SATVOICE and datalink communications are gradually being introduced into NAT operations, operators may still need HF datalink as back-up.
Operators that can demonstrate compliance with the ICAO satellite voice guidance material (SVGM) requirements, may receive CASA authorisation to use SATVOICE in the NAT HLA region.
To be authorised for SATVOICE, aircraft must meet installation requirements and operational procedures must be appropriate.
To use SATVOICE in the NAT HLA region, contact CASA via email@example.com.