Acronym MNP

It is very similar to RNP and has to deal with navigation performace with aircraft on the NAT (North Atlantic Track). It is basically a set of limits that aircraft but be able to navigate within. It was created back in the late 70's to help make better use the of the NAT's.
 
I_WANNA_BE_ATP said:
and the definition is ????
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Here's an excerpt from The FAA's International Flight Information Manual

The concept of Minimum Navigation Performance Specifications (MNPS) has been adopted on a world-wide basis by the International Civil Aviation Organization (ICAO). MNPS has the objective of ensuring safe separation of aircraft and of enabling operators to derive maximum economic benefit from the improvement in accuracy of navigation equipment which has been demonstrated in recent years. A condition implicit of MNPS is that all operators must maintain the specified operating standards and be aware of the inherent obligations of the MNPS requirements. The MNPS concept will be implemented on a regional basis.
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and another:

Aircraft used to conduct flights within the volume of airspace specified shall have navigation performance capability such that:

1. The standard deviation of lateral track errors shall be less than 6.3 NM (11.7 km).

NOTE- As a considerable simplification, the above can be interpreted as a need for aircraft to stay within 12.6 NM (23.4 km) of track for about 95 percent of the time.

2. The proportion of the total flight time spent by aircraft 30 NM (55.6 km) or more off the cleared track shall be less than 5.3x104(i.e., less than 1 hour in about 2000 flight hours).

3. The proportion of the total flight time spent by aircraft between 50 and 70 NM (92.6 and 129.6 km) off the cleared track shall be less than 13x105(i.e., less than 1 hour in about 8,000 flight hours).
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