ETOPS and MNPS

ETOPS (Extended-range Twin-engine Operational Performance Standards) is an acronym for an International Civil Aviation Organization (ICAO) rule permitting newer twin-engined commercial air transports to fly routes that, at some points, are further than a distance of 60 minutes flying time from an emergency or diversion airport. This definition allows twin-engined airliners-like Boeing 737, 757, 767, 777 and Airbus A300, A310, A320 series, A330-to fly long distance routes (especially over water, desert or remote polar areas) that were previously off-limits to twin-engined aircraft. ETOPS is sometimes read (humorously) as Engines Turn or Passengers Swim.

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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