RNP-4: More accurate navigation equipment, which is certified in accordance with ICAO’s “Require Navigation Performance” specifications, ensures that aircraft can fly accurately to a centerline. The lower the RNP value, the more accurate the equipment.

What does RNP 4 mean?

RNP 4 and/or RNP 10 approval refers to long range navigational capability of an aircraft operating in remote airspace. Improved navigation capability allows for reduced lateral/longitudinal spacing along heavily used oceanic tracks particular to the Pacific airspace.

What is RNP value?

RNP refers to the level of performance required for a specific procedure or a specific airspace block. An RNP of 0.3 means the aircraft navigation system must be able to calculate its position to within a circle with a radius of 3 tenths of a NM.