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NACA
9 NASA Advisory Council.
NACA 1 National Advisory Committee for
Aeronautics (US, 1915–58, became NASA).
2 National Air Carrier Association [office,
Washington, DC] (US, from 1962).
NACA cowling Drag-reducing annular cowl for radial
engines with aerofoil-profile leading edge and cylindrical
main section.
NACA section Any of numerous aerofoil sections
designed by NACA.
NACA standard atmosphere Original idealized atmosphere,
published in 1925; later superseded by ICAO,
ARDC and others.
NACEL Naval air crew equipment laboratory.
nacelle Streamlined body sized according to what it
contains, which may be an engine, landing gear, human
occupants etc; when tail carried on separate booms * takes
place of fuselage.
NACES, Naces Navy aircrew common ejection seat
(USN).
Nacisa, NACISA NATO Communications and
Informations Systems Agency.
Nacma NATO Air Command and Control
Management Agency.
Nacoss National Approval Council for Security
Systems (UK).
Nacre New aircraft concepts research.
NACP Noise-abatement climb procedure.
nacreous cloud High layer cloud with iridescent appearance;
also called mother-of-pearl cloud.
Nacsi NATO Advisory Committee on Signals
Intelligence.
NAD 1 National Armament Director[s] (NATO
nations).
2 Navy area defense (SAM, USN).
NADB Netherlands Aircraft Development Board.
NADC 1 US Naval Air Development Center.
2 Nuclear Affairs Defence Council (NATO).
3 NATO Air-Defence Committee.
4 Noise-abatement departure procedure.
Nadcap Widespread industry group, originally US
when name meant National Aerospace and Defense
Contractors Accreditation Program, now no longer an
acronym, (Int.).
NADEEC NATO Air Defence Electronic Environment
Committee (NATO).
NAD83 North American datum of 1983, precise
geographic co-ordinates.
Nadep Naval Aviation [or Air] Depot (USN).
Nadge NATO air-defence ground environment; multinational
programme for unified air-defence system of
radars, computers, displays and communications from
North Cape to eastern Turkey.
Nadgeco Multinational company formed to implement
Nadge plan.
Nadgemo Nadge Management Office; formed within
NATO to act as unified customer.
Nadin 1 National airspace data-interchange network
(FAA).
2 North American data-interchange network.
Nadir Point on celestial sphere vertically below
observer, ie 180° from zenith. Thus, through- * tracking
= during overflight.
NADL US Navy Avionics Development Laboratory.
naked
NADS 1 US Naval Air Development Station (from
1947).
2 National Armaments Directors (NATO).
3 Next available delivery slot.
NAE 1 National Aeronautical Establishment (Canada).
2 National Academy of Engineering (US).
3 US Naval Air Engineering, concerned with aerospace
installations in ships [F adds Facility 1956–62, L adds
Laboratory from 1962].
NAEC 1 US Naval Air Engineering Center
(Philadelphia), NAMC renamed 1962.
2 National Aerospace Education Council (US).
Naegis, NAEGIS NATO airborne early warning
ground environment integration segment.
NAEL(SI) Naval Air Engineering Laboratory (Ship
Installations), from 1962.
NAES 1 Naval Aviation Engineering Services (US);
plus U = unit.
2 US Naval Air Experimental Station (1943–57).
NAEW NATO airborne early warning; F adds force
(base Geilenkirchen, G).
NAF 1 Norsk Astronautisk Førening (Norway).
2 Non-appropriated fund(s).
3 Naval air facility (US).
Nafag NATO Air Force Armaments Group.
Nafdu Naval Air Fighting Development Unit.
NAFEC, Nafec National Aviation Facilities
Experimental Center; Atlantic City, NJ (US 1958, in 1981
became FAATC).
NAFI National Association of Flight Instructors
[Dublin, OH] (US).
NAFIN, Nafin Netherlands armed-forces integrated
network.
NAFP National aeronautical facilities program(me).
NAFS National Association of Flight Schools [office,
Miami Lakes, FL] (US).
Nagara Japanese word in Western use: a critical-path
technique linking manufacturing operations, and
balancing times to reduce lead times and WIP inventory.
NAGr Short-range reconnaissance wing (G, WW2).
NAGS, Nags NATO alliance ground surveillance.
NAGTE Non-aircraft gas-turbine engine.
Nahema NATO Helicopter Management Agency [Aixen-Provence
F-13082] (Int.).
NAHF National Aviation Hall of Fame [Dayton, OH
45402] (US).
NAHSI National Aviation Heritage Skills Initiative
(BAPC).
NAI 1 Negro Airmen International [education and
training; Oshkosh, WI54903] (US).
2 Netherlands Aerospace Industries (member
AECMA, title in English).
3 National Aerospace Initiative (US).
NAIA National Aerospace Intelligence Agency (USAF).
Nails National airspace integrated logistics support
(FAA).
NAIU Naval Accident Investigation Unit.
NAK 1 National aero club (R).
2 Norsk Aero Klubb [N-0102 Oslo] (Norway).
3 Negative acknowledgement.
NaK Generalised term for all mixtures of sodium and
potassium; used eg as liquid-metal heat-transfer media.
NAKA National aerospace agency (Kazakhstan).
naked See clean (1, 2).
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