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6/17/21 

Pilot/Controller Glossary 

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.) 

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. 

(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. 

(See RADAR SEPARATION.) 

NON

RESTRICTIVE ROUTING (NRR)

 Portions 

of a proposed route of flight where a user can flight 
plan the most advantageous flight path with no 
requirement to make reference to ground

based 

NAVAIDs. 

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 “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. 

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 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. 

NOT STD-

(See NOT STANDARD.) 

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 (NOTAM)

 A notice 

containing information (not known sufficiently in 

PCG N