Aviation and air traffic control terminology · MLC-0104
Aviation and air traffic control terms: N (33)
- NAS, see National Airspace System
- NAT HLA, see North Atlantic high level airspace (NAT HLA)
- National Airspace SystemThe common network of U.S. airspace; air navigation facilities, equipment and services, airports or landing...
- National beacon code allocation plan airspace (NBCAP)Airspace over United States territory located within the North American continent between Canada and Mexico...
- National flight data digest (NFDD)A daily (except weekends and Federal holidays) publication of flight information appropriate to aeronautical...
- National search and rescue planAn interagency agreement which provides for the effective utilization of all available facilities in all...
- National security area (NSA), see Special use airspace
- NAVAID, see Navigational aid
- NAVAID classesVOR, VORTAC, and TACAN aids are classed according to their operational use. The three classes of NAVAIDs are:
- Navigable airspaceAirspace at and above the minimum flight altitudes prescribed in the CFRs including airspace needed for safe...
- Navigation reference system (NRS)The NRS is a system of waypoints for use within the United States for flight planning and navigation without...
- Navigation specification [ICAO]A set of aircraft and flight crew requirements needed to support performance-based navigation operations...
- Navigational aidAny visual or electronic device airborne or on the surface which provides point-to-point guidance information...
- NAVSPEC, see Navigation specification [ICAO]
- NBCAP airspace, see National beacon code allocation plan airspace (NBCAP)
- NDB, see Nondirectional beacon
- Negative“No,” or “permission not granted,” or “that is not correct.”
- Negative contactUsed by pilots to inform ATC that:
- NFDD, see National flight data digest (NFDD)
- NightThe time between the end of evening civil twilight and the beginning of morning civil twilight, as published...
- Night [ICAO]The hours between the end of evening civil twilight and the beginning of morning civil twilight or such other...
- No gyro approachA radar approach/vector provided in case of a malfunctioning gyro-compass or directional gyro. Instead of...
- No gyro vector, see No gyro approach
- No transgression zone (NTZ)The NTZ is a 2,000 foot wide zone, located equidistant between parallel runway or SOIA final approach...
- Nonapproach control towerAuthor-izes aircraft to land or takeoff at the airport controlled by the tower or to transit the Class D...
- Noncommon route/portionThat segment of a North American Route between the inland navigation facility and a designated North American...
- Non-cooperative surveillanceAny surveillance system, such as primary radar, that is not dependent upon the presence of any equipment on...
- Nondirectional beaconAn L/MF or UHF radio beacon transmitting nondirectional signals whereby the pilot of an aircraft equipped...
- Nonmovement areasTaxiways and apron (ramp) areas not under the control of air traffic.
- Nonprecision approach, see Nonprecision approach procedure
- Nonprecision approach procedureA standard instrument approach procedure in which no electronic glideslope is provided; e.g., VOR, TACAN...
- NonradarPrecedes other terms and generally means without the use of radar, such as:
- Non-restrictive routing (NRR)Portions of a proposed route of flight where a user can flight plan the most advantageous flight path with no...
- NOPAC, see North Pacific
- NORDO (No Radio)Aircraft that cannot or do not communicate by radio when radio communication is required are referred to as...
- Normal operating zone (NOZ)The NOZ is the operating zone within which aircraft flight remains during normal independent simultaneous...
- North American routeA numerically coded route preplanned over existing airway and route systems to and from specific coastal...
- North American route program (NRP)The NRP is a set of rules and procedures which are designed to increase the flexibility of user flight...
- North Atlantic high level airspace (NAT HLA)That volume of airspace (as defined in ICAO Document 7030) between FL 285 and FL 420 within the Oceanic...
- North PacificAn organized route system between the Alaskan west coast and Japan.
- Not standardVarying from what is expected or published. For use in NOTAMs only.
- Not STD, see Not standard
- NOTAM, see Notice to Airmen (NOTAM)
- NOTAM [ICAO]A notice containing information concerning the establishment, condition or change in any aeronautical...
- Notice to Airmen (NOTAM)A notice containing information (not known sufficiently in advance to publicize by other means) concerning...
- NRR, see Non-restrictive routing (NRR)
- NRS, see Navigation reference system (NRS)
- Numerous targets vicinity (location)A traffic advisory issued by ATC to advise pilots that targets on the radar scope are too numerous to issue...
33 of 1,122 terms in Aviation and air traffic control terminology (MLC-0104). Request the full dataset.