the Aviation Dictionary

MOS - metal oxide
semiconductor
MOSFET - metal oxide
semiconductor field effect
transistor
MOU - memorandum of
understanding
mph - miles per hour.
MPO - Metropolitan Planning
Organization
MPS - maintenance processor
subsystem
MPS - master plan supplement
MRA - minimum reception
altitude
MRC - monthly recurring charge
MS - military standard
MSA - minimum safe altitude
MSAW - minimum safe altitude
warning
MSB - most significant bit
MSD - most significant digit
MSI - medium-scale integration
MSL - mean sea level
MSN - message switching
network
MTCS - modular terminal
communications system
MTI - moving target indicator
MTR - military training route
MULTICOM - frequency used
at airports without a tower, FSS,
or UNICOM
MUX - multiplexer
MVA - minimum vectoring
altitude
MVFR - marginal VFR
MVFR - marginal visual flight
rules
N - Rotational speed, RPM.
n.m. - nautical miles
N1 - Low pressure spool.
N2 - High pressure spool.
N,O - Nitrous oxide.
NAAQS - National Ambient Air
Quality Standards
NACO - National Aeronautical
Charting Office
NADA - NADIN concentrator
NADIN -National Airspace
Data Interchange Network
NADSW - NADIN switches
NAF -Naval
Aircraft Factory
NAILS - National Airspace
Integrated Logistics Support
NAPRS -National Airspace
Performance Reporting System
NAS -National
Standard
Aircraft
NAS - National Airspace System
NAS - National Aerospace
Standard
NAS - Naval Air Station
NASA - National Aeronautics
and Space Administration
NASDC -National
Safety Data
NASP -National
System Plan
Aviation
Airspace
NASPAC -National Airspace
System Performance Analysis
Capability
NATCO -National
Communications Switching
Center
NATO - North Atlantic Treaty
Organization.
NAVAID - navigation aid
NAVMN - navigation monitor
and control
NAWAU -National Aviation
Weather Advisory Unit
NAWPF - National Aviation
Weather Processing Facility
NBCAP -National
Allocation Plan
Beacon Code
NCAR -National Center for
Atmospheric Research
NCF - National Control Facility
NCIU - NEXRAD
communications interface unit
NCS - National Communications
System
NDB - nondirectional radio
beacon
NDB(ADF) - nondirectional
beacon (automatic direction
finder)
NEPA - National Environmental
Policy Act
NEXRAD - next generation
weather radar
NFAX - National Facsimile
Service
NFDC - National Flight Data
Center
NFDD - National Flight Data
Digest
NFIS - NAS Facilities
Information System
NI- network interface
NICS - National Interfacility
Communications System
NIDS - National Institute for
Discovery Sciences
NIMA - National Imagery and
Mapping Agency
NM - nautical mile
nm - nautical mile.
NMAC - near mid air collision
NMC - National Meteorological
Center
NMCE - network monitoring
and control equipment
NMCS - network monitoring
and control system
NOAA - National Oceanic and
Atmospheric Administration
NOC - notice of completion
NOPAC -North
Pacific
NoPT - no procedure turn
required
NOS - National Ocean Service
NOTAM - notice to airmen
NPA - nonprecision approach
NPDES - National Pollutant
Discharge Elimination System
Aircraft Technical Book Company
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Tabernash, CO 80478
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