Guidance concerning Air Navigation in and above the NAT MNPSA
CHAPTER 16: GUIDANCE FOR DISPATCHERS
The North Atlantic Region is essentially divided into two distinct areas for flight operation,
e. MNPS Airspace and non-MNPS airspace. Operations within MNPS Airspace require the user to adhere
to very specific operating protocols. The vertical dimension of MNPS Airspace is between FL285 and FL420 (i.e. in terms of normally used cruising levels, from FL290 to FL410 inclusive).
The lateral dimensions include the following Areas:
Those portions of the NEW YORK OCEANIC North of 27°N but excluding the area west of 60°W and south of 38°30'N;
And all of the REYKJAVIK, SHANWICK, GANDER and SANTA MARIA OCEANIC Control Areas (CTAs).
Regulatory Requirements and Consequential Routing Limitations
State Approvals (MNPS/RVSM)
Before planning any operations within the North Atlantic MNPS Airspace operators and
pilots must ensure that the specific State MNPS and RVSM Approvals are in place. These requirements are
addressed in Chapter 1 of this Manual at paragraphs 1.1.1, 1.1.2 and 1.1.3.
Minimum Equipage (Navigation/Altimetry/Communications)
Section 1.3 discusses the minimum navigation equipage requirements for unrestricted flight
in NAT MNPS Airspace.
The Minimum Aircraft Systems Performance Specifications for RVSM operations are
common world-wide standards and are contained in ICAO Doc 9574 (Manual on Implementation of a 300m (1 000ft) Vertical Separation Minimum between FL290 and FL410 inclusive.). They are also detailed in designated FAA document, AC91-85, and in JAA document, TGL6, Revision 1 (i.e. Temporary Guidance
Leaflet No. 6) These two documents can be accessed via:
http://www.faa.gov/about/office_org/headquarters_offices/ato/service_units/enroute/rvsm/ and http://www.ecacnav.com/rvsm/library.htm,
respectively. However, notwithstanding the worldwide nature of RVSM MASPS, it must be recognised, as indicated in Chapter 1 paragraph 1.2.2 above, that special provisions apply in the North Atlantic MNPS Airspace and in consequence all NAT crews/operators must be State approved specifically for NAT RVSM operations.
Most NAT air/ground ATC communications are conducted on single side-band HF For unrestricted operations in the NAT Region fully functioning HF Communications
equipment is required. While SATCOM Voice and Datalink communications are being gradually introduced into NAT operations, HF may still be required as back-up.
NAT Doc 007