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Glossary

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NA or N/A :

Note Applicable
NAS :

National Airspace System or National Air Space
NATS :

National Air Traffic Services (UK)
NAV :

NAVigation sub-system
NC :

Non Compliant
NCC :

Network Control Centre
NCM :

Network Control Management
NCR :

Non-Conformance Report
NCRB :

Non-conformance Review Board
NI :

Non Integrity
NIHID :

Non-Integrity Hazardous Invalid Data
NLES :

Navigation Land Earth Station
NLES-1B :

Backup to NLES-R
NLES-2B :

Backup to NLES-A
NLES-A :

NLES – Aussagel France
NLES-R :

NLES – Riesting Germany
NLESRD :

NLES Requirements Document
NM :

Nautical Mile
NMC :

Network Management Center
NMF :

Network Management Facility
NOC :

Network Operations Centre
NOCC :

Network Operation Control Centre
NOTAM :

Notice To Airmen
NPA :

Non Precision Approach
NPL :

National Physical Laboratory
NSA :

Navigation Service Availability
NSE :

Navigation System Error
NSV :

Number of Satellite Vehicles
NTW :

Network
NTWRD :

Network Requirements Document
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