1Dk4eXg

NPPL
NPPL National Private Pilot’s Licence [proposed, VFR
only] (UK).
NPR 1 No power recovery.
2 Nozzle pressure ratio.
3 Nuclear posture review (US).
4 Noise preferential route.
NPRM Notice of proposed rulemaking (FAA).
NPRS Non-persistent.
NPS 1 Non-prior service.
2 Naval Post-graduate School (USN).
3 Nuclear profiled sortie.
4 Nitrogen purge system.
NPT Non-proliferation treaty, 1 July 1968.
NPTA National Passenger Traffic Association, [office,
New York] (US).
NPTR 1 National Parachute Test Range.
2 No procedure turn required.
NPU Navigation processor unit.
NQA National Quality Assurance [certification
authority] (UK).
NQIS Navigation-quality inertial sensor.
NQP Night Quota Period [usually 23.00–07.00] (airport
noise).
NQR Nuclear quadrupole resonance.
NR, Nr 1 Helicopter main-rotor rpm.
2 Network router.
N/R Navigator, radar.
nr
– Yawing moment coefficient due to yawing.
Nr Number (FAA).
N r 1 Helicopter main-rotor rpm.
NRA 1 Nuclear reaction analysis, ion-beam technique
for light elements.
2 NASA Research Announcement; hence NRAs,
plural.
NRAG Non-metallics research advisory group
(MRCC).
NRAL Nuffield Radio Astronomy Laboratory [Jodrell
Bank, SK11 9DL] (UK).
NRC 1 National Research Council [office, Washington
DC20418] (US).
2 National Research Council of Canada [office,
Ottawa, Ontario K1A 0R6] (Canada).
3 Nuclear reporting cell.
4 Nuclear Regulatory Commission [1974 onwards]
(US).
5 Non-routine card.
6 Non-recurring cost[s].
NRCS Normalized radar cross-section.
NRD Network routing domain.
NRDC 1 National Research Development Corporation
(UK).
2 Natural Resources Defense Council (US).
NRDS Nuclear rocket development station (Jackass
Flats, US).
NRE Non-recurring engineering.
NRF NATO Response Force, also called NATO
Reaction Force (2002–).
NRH No reply heard.
NRI Net radio interface.
NRIET Nanjing Research Institute of Electronic
Technology (China).
NRJC Non-routine job card.
NRL Naval Research Laboratory (USN).
NRMM Navaids remote maintenance and monitoring.
NSNF
NRO National Reconnaissance Office (US).
NROSS, Nross Navy remote ocean sensing system or
satellite (spacecraft, USN).
NROTC Naval Reserve Officer Training Corps (US).
NRP 1 Normal rated power.
2 Narrow programmable receiver.
3 National Route Program, or Plan (US).
4 Non-return point.
NRPA Net return on productive assets.
NRPB National Radiological Protection Board.
NRR Noise-reduction rating (EPA).
NRRC Nuclear-Risk Reduction Centers (1987).
NRSC National Remote Sensing Centre (in civil
enclave at former RAE Farnborough, UK).
NRST Nearest.
NRT Near real time [DF adds data fusion, RAS
resource allocation system].
NRTC National Rotorcraft Test Center (US).
NRTF National Radar Test Facility (US).
NRTS Not repairable this station (USAF).
nrv Non-return valve.
NRZ Non-return to zero.
NS 1 Non-skid.
2 Network service.
Ns 1 Nimbostratus.
2 Newton-second, also N-s.
ns Nanosecond[s] (10 –9 s).
n s Maximum sustained normal acceleration.
NSA 1 National Security Agency (US).
2 National Standards Association [Washington, DC]
(US).
NSAP Network service access point.
NSAU National Space Agency of Ukraine.
NSAR North Sea air-combat manoeuvring instrumented
range.
NSAWC Naval Strike and Air Warfare Center (USN).
NSC 1 National Security Council (US).
2 No significant cloud.
3 New Scottish [ATC] Centre, Prestwick.
4 National Safety Council [office, Itasca, IL
60143–3201] (US).
5 National Space Club [association of manufacturers;
office, Washington, DC] (US).
NSCA National Safety Council of America.
NSDA National Space Development Agency (J).
NSDU Network service data unit.
NSE Near-synchronous equatorial.
NSEU Neutron single-event upset.
NSF National Science Foundation (US).
NSFAC Non-Scheduled Flying Advisory Committee
(CAA, 1945).
NSG 1 NATO Standardization Group.
2 North-seeking gyrocompass.
NSGr Night close-support group (G, WW2).
NSIA National Security Industrial Association [office,
Washington, DC] (US).
NSIU Navigation switching interface unit.
NSKK Ag-aviation association [office, Tokyo] (J).
NSM Non-contact stress measurement.
NSMS Non-intrusive stress-monitoring [or measurement]
system.
NSMV Near-space maneuvering vehicle (USAF).
NSN National [or NATO] stock number[s].
NSNF Non-strategic nuclear forces.
454