NORDO-
(See LOST COMMUNICATIONS.)
NORMAL OPERATING ZONE (NOZ)- The NOZ is the operating zone within which aircraft flight remains during normal independent simultaneous parallel ILS approaches.
NORTH AMERICAN ROUTE- A numerically coded route preplanned over existing airway and route systems to and from specific coastal fixes serving the North Atlantic. North American Routes consist of the following:
a..
Common Route/Portion. That segment of a North American Route between the inland navigation facility and the coastal fix.

b..
Noncommon Route/Portion. That segment of a North American Route between the inland navigation facility and a designated North American terminal.

c..
Inland Navigation Facility. A navigation aid on a North American Route at which the common route and/or the noncommon route begins or ends.

Pilot/Controller Glossary
d..Coastal Fix. A navigation aid or intersection where an aircraft transitions between the domestic route structure and the oceanic route structure.
NORTH AMERICAN ROUTE PROGRAM (NRP)-The NRP is a set of rules and procedures which are designed to increase the flexibility of user flight planning within published guidelines.
NORTH MARK- A beacon data block sent by the host computer to be displayed by the ARTS on a 360 degree bearing at a locally selected radar azimuth and distance. The North Mark is used to ensure correct range/azimuth orientation during periods of CENRAP.
NORTH PACIFIC-An organized route system between the Alaskan west coast and Japan.
NOTAM-
(See NOTICE TO AIRMEN.)
NOTAM [ICAO]- A notice containing information concerning the establishment, condition or change in any aeronautical facility, service, procedure or hazard, the timely knowledge of which is essential to personnel concerned with flight operations.
a.
I Distribution- Distribution by means of telecommunication.

b..
II Distribution- Distribution by means other than telecommunications.

NOTICE TO AIRMEN- A notice containing information (not known sufficiently in advance to publicize by other means) concerning the establish-ment, condition, or change in any component (facility, service, or procedure of, or hazard in the National Airspace System) the timely knowledge of which is essential to personnel concerned with flight operations.
a..
NOTAM(D)- A NOTAM given (in addition to local dissemination) distant dissemination beyond the area of responsibility of the Flight Service Station. These NOTAMs will be stored and available until canceled.

b..
NOTAM(L)- A NOTAM given local disse-mination by voice and other means, such as telautograph and telephone, to satisfy local user requirements.

c.
FDC NOTAM- A NOTAM regulatory in nature, transmitted by USNOF and given system wide dissemination.

(See ICAO term NOTAM.)

NOTICES TO AIRMEN PUBLICATION-A publication issued every 28 days, designed primarily for the pilot, which contains current NOTAM information considered essential to the safety of flight as well as supplemental data to other aeronautical publications. The contraction NTAP is used in NOTAM text.