Pilot/Controller Glossary Pilot/Controller Glossary  8/15/19 7/16/20  requirement to make reference to ground-based  NAVAIDs.  NOPAC- (See NORTH PACIFIC.)  NONPRECISION APPROACH- (See NONPRECISION APPROACH  PROCEDURE.)  NONPRECISION APPROACH PROCEDURE- A  standard instrument approach procedure in which no  electronic glideslope is provided; e.g., VOR,  TACAN, NDB, LOC, ASR, LDA, or SDF  approaches.  NORDO  (No Radio)- Aircraft that cannot or do not  communicate by radio when radio communication is  required are referred to as “NORDO.”  (See LOST COMMUNICATIONS.)  NONRADAR- Precedes other terms and generally  means without the use of radar, such as:  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.  Nonradar Approach. Used to describe  instrument approaches for which course guidance on  final approach is not provided by ground-based  precision or surveillance radar. Radar vectors to the  final approach course may or may not be provided by  ATC. Examples of nonradar approaches are VOR,  NDB, TACAN, ILS, RNAV, and GLS approaches.  (See FINAL APPROACH COURSE.)  (See FINAL APPROACH-IFR.)  (See INSTRUMENT APPROACH  PROCEDURE.)  (See RADAR APPROACH.)  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.  d.  Coastal Fix. A navigation aid or intersection  where an aircraft transitions between the domestic  route structure and the oceanic route structure.  b.  Nonradar Approach Control. An ATC facility  providing approach control service without the use of  radar.  (See APPROACH CONTROL FACILITY.)  (See APPROACH CONTROL SERVICE.)  c.  Nonradar Arrival. An aircraft arriving at an  airport without radar service or at an airport served by  a radar facility and radar contact has not been  established or has been terminated due to a lack of  radar service to the airport.  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.  (See RADAR ARRIVAL.)  (See RADAR SERVICE.)  d.  Nonradar Route. A flight path or route over  which the pilot is performing his/her own navigation.  The pilot may be receiving radar separation, radar  monitoring, or other ATC services while on a  nonradar route.  (See RADAR ROUTE.)  e.  Nonradar Separation. The spacing of aircraft in  accordance with established minima without the use  of radar; e.g., vertical, lateral, or longitudinal  separation.  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 Control Areas of Bodo Oceanic,  Gander Oceanic, New York Oceanic East, Reykjavik,  Santa Maria, and Shanwick, excluding the Shannon  and Brest Ocean Transition Areas. ICAO Doc 007  North Atlantic Operations and Airspace Manual provides detailed information on related aircraft and  operational requirements.  NORTH PACIFIC- An organized route system  between the Alaskan west coast and Japan.  NOT STANDARD- Varying from what is expected  or published. For use in NOTAMs only.  NON-RESTRICTIVE ROUTING (NRR)- Portions  of a proposed route of flight where a user can flight  plan the most advantageous flight path with no  (See RADAR SEPARATION.)  PCG N-3 