Guidance concerning Air Navigation in and above the NAT MNPSA
OPERATIONAL APPROVAL AND AIRCRAFT SYSTEM REQUIREMENTS FOR FLIGHT IN THE NAT MNPS AIRSPACE
Pilots may fly across the North Atlantic within MNPS Airspace only if they are in possession of the appropriate MNPS and RVSM Approvals issued by the State of Registry of the aircraft or by the State of the Operator.
It is implicit in the concept of MNPS that all flights within the airspace achieve the highest
standards of horizontal and vertical navigation performance and accuracy. Formal monitoring programmes are undertaken to quantify the achieved performances and to compare them with standards required to ensure
that established Target Levels of Safety (TLS) are met.
Collision Risk Modelling is used to estimate risk in each of the three dimensions (i.e.
lateral, longitudinal and vertical).
Target maxima set for these estimates are expressed in terms of
potential collisions per flight hour and are known as “Target Levels of Safety(TLSs)”.
Aircraft operating within MNPS Airspace are required to meet Minimum Navigation
Performance Specifications (MNPS) in the horizontal plane through the mandatory carriage and proper use
of a specified Operator for performance
level of navigation equipment that has been approved by the State of Registry or State of the
aspects affecting the expected appropriate cockpit/flight deck
Since January 2002 when the final phase implementation of RVSM at all levels in NAT
MNPS Airspace took place, all aircraft intending to operate within NAT MNPS Airspace have had to be equipped with altimetry and height-keeping systems which meet RVSM Minimum Aircraft System Performance Specifications (MASPS). RVSM MASPS are contained in ICAO Doc 9574 and detailed in designated FAA document, AC91-85, and in Joint Aviation Authority (JAA) Temporary Guidance Leaflet (TGL No.6), Revision 1. These documents can be downloaded from:
h t t p : / / w w w . f a a . g o v / a b o u t / o f f i c e _ o r g / h e a d q u a r t e r s _ o f f i c e s / a t o / s e r v i c e _ u n i t s / e n r o u t e / r v s m / d o c u m e n t a t i o n http://www.ecacnav.com/downloads/TGL6rev1.pdf, respectively. and
This Document, together with the RVSM MASPS documents, are provided to assist States
of Registry, operators, owners and planning staff who are responsible for issuing or obtaining MNPS/RVSM approvals for aircraft. However, the ultimate responsibility for checking that a NAT MNPS/RVSM flight has the necessary approval(s) rests with the pilot in command. In the case of most regular scheduled flights this check is a matter of simple routine but pilots of special charter flights, private flights, ferry and delivery flights are advised to pay particular attention to this matter. Routine monitoring of NAT traffic regularly reveals examples of pilots of non-approved flights, from within these user groups, flight planning or requesting clearance within MNPS Airspace. All such instances are prejudicial to safety and are referred to relevant State Authorities for further action.
While not a specific element of NAT MNPS approval, pilots and operators are reminded that
for flights over the NAT, Transmitters (ELTs). It exclusively on frequency
ICAO SARPS Annex 6, Part 1, Chapter 6, requires carriage of Emergency Locator should be further noted that new specifications for these beacons to operate 406 MHz (but with a 121.5 MHz search and rescue homing capability) have been
in effect since January 2005. New aircraft have been required to be so equipped since 2005.
NAT Doc 007