Aeronautical Terms beginning with N
NANU
Notice Advisory to Navstar Users
NAS
U.S. National Airspace System
NAT/MNPS
North Atlantic Minimum Navigation Performance Specifications
Nav
Spec Navigation Specification
NAVAID
Navigational Aid
Navigation Application
This is defined as the application of a Nav Spec and the supporting NAVAID infrastructure, to routes, procedures, and/or defined airspace volume, in accordance with the intended airspace concept.
Navigation Specification (Nav Spec)
A set of aircraft and aircrew requirements needed to support PBN operations within a defined airspace. There are two kinds of Nav Spec: 1. RNAV specification. A Nav Spec based on RNAV that does not include the requirement for onboard performance monitoring and alerting, designated by the prefix RNAV (e.g., RNAV 5, RNAV 1). 2. RNP specification. A Nav Spec based on RNAV that includes the requirement for onboard performance monitoring and alerting, designated by the prefix RNP (e.g., RNP 4, RNP APCH).
Navigation System Error (NSE)
NSE or Position Estimation Error (PEE) is the difference between the true position and estimated position.
Navigational Aid (NAVAID) Infrastructure
NAVAID infrastructure refers to space-based and or ground-based NAVAIDs available to meet the requirements in the navigation specification (Nav Spec).
NDB
Non-Directional Beacon
NM
Nautical Mile
NOTAM
Notice to Airmen
NPA
Nonprecision Approach
NSE
Navigation System Error
NWS
National Weather Service
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