Glossary of Terms
Navigation specificationNavigation specification. A set of aircraft and flight crew requirements needed to support performance-based navigation
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NCDNCD - No cloud detected |
NDVNDV - No directional variation (meteorology) |
Near-parallel runwaysNear-parallel runways. Non-intersecting runways whose extended centre lines have an angle of convergence/divergence of 15 |
NewtonNewton (N). The force which when applied to a body having a mass of 1 kilogram gives it an acceleration of 1 metre per |
NightThe hours between the end of evening civil twilight and the beginning of morning civil twilight or such other period.
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Night-Ireland“night” means the hours between the end of evening civil twilight and the beginning of |
NMNautical mile (NM). The length equal to 1 852 metres exactly. |
Non-instrument runwayNon-instrument runway. A runway intended for the operation of aircraft using visual approach procedures. |
Normal operating differential pressure‘Normal operating differential pressure’ means the pressure differential between the cabin |