4/20/23 

Pilot/Controller Glossary 

NON

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COOPERATIVE  SURVEILLANCE

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 Any surveillance system, such as primary radar, that is not 

dependent upon the presence of any equipment on the aircraft or vehicle to be tracked. 

(See COOPERATIVE SURVEILLANCE.) 
(See RADAR.) 

NONDIRECTIONAL BEACON

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 An L/MF or UHF radio beacon transmitting nondirectional signals whereby 

the pilot of an aircraft equipped with direction finding equipment can determine his/her bearing to or from the 

radio beacon and “home” on or track to or from the station. When the radio beacon is installed in conjunction 

with the Instrument Landing System marker, it is normally called a Compass Locator. 

(See AUTOMATIC DIRECTION FINDER.) 
(See COMPASS LOCATOR.) 

NONMOVEMENT AREAS

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Taxiways and apron (ramp) areas not under the control of air traffic. 

NONPRECISION APPROACH

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(See NONPRECISION APPROACH PROCEDURE.) 

NONPRECISION APPROACH PROCEDURE

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 A standard instrument approach procedure in which no 

electronic glideslope is provided; e.g., VOR, TACAN, NDB, LOC, ASR, LDA, or SDF approaches. 
NONRADAR

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 Precedes other terms and generally means without the use of radar, such as: 

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.) 

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

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RESTRICTIVE ROUTING (NRR)

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 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

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based NAVAIDs. 

NOPAC

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(See NORTH PACIFIC.) 

NORDO 

(No Radio)

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 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)

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 The NOZ is the operating zone within which aircraft flight remains 

during normal independent simultaneous parallel ILS approaches. 

PCG N

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