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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 establishment,
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 dissemination
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.)
Pilot/Controller Glossary 2/14/08
PCG N-4
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.
(See NOTICE TO AIRMEN.)
NRR-
(See NON-RESTRICTIVE ROUTING.)
NRS-
(See NAVIGATION REFERENCE SYSTEM.)
NTAP-
(See NOTICES TO AIRMEN PUBLICATION.)
NUMEROUS TARGETS VICINITY (LOCATION)-
A traffic advisory issued by ATC to advise
pilots that targets on the radar scope are too numerous
to issue individually.
(See TRAFFIC ADVISORIES.)
2/14/08 Pilot/Controller Glossary
PCG O-1
O
OBSTACLE- An existing object, object of natural
growth, or terrain at a fixed geographical location or
which may be expected at a fixed location within a
prescribed area with reference to which vertical
clearance is or must be provided during flight
operation.
OBSTACLE DEPARTURE PROCEDURE (ODP)-
A preplanned instrument flight rule (IFR) departure
procedure printed for pilot use in textual or graphic
form to provide obstruction clearance via the least
onerous route from the terminal area to the
appropriate en route structure. ODPs are recommended
for obstruction clearance and may be flown
without ATC clearance unless an alternate departure
procedure (SID or radar vector) has been specifically
assigned by ATC.
(See IFR TAKEOFF MINIMUMS AND
DEPARTURE PROCEDURES.)
(See STANDARD INSTRUMENT
DEPARTURES.)
(Refer to AIM.)
OBSTACLE FREE ZONE- The OFZ is a three
dimensional volume of airspace which protects for
the transition of aircraft to and from the runway. The
OFZ clearing standard precludes taxiing and parked
airplanes and object penetrations, except for
frangible NAVAID locations that are fixed by
function. Additionally, vehicles, equipment, and
personnel may be authorized by air traffic control to
enter the area using the provisions of FAAO JO
7110.65, Para 3-1-5, VEHICLES/EQUIPMENT/
PERSONNEL ON RUNWAYS. The runway OFZ
and when applicable, the inner‐approach OFZ, and
the inner‐transitional OFZ, comprise the OFZ.
a. Runway OFZ. The runway OFZ is a defined
volume of airspace centered above the runway. The
runway OFZ is the airspace above a surface whose
elevation at any point is the same as the elevation of
the nearest point on the runway centerline. The
runway OFZ extends 200 feet beyond each end of the
runway. The width is as follows:
1. For runways serving large airplanes, the
greater of:
(a) 400 feet, or
(b) 180 feet, plus the wingspan of the most
demanding airplane, plus 20 feet per 1,000 feet of
airport elevation.
2. For runways serving only small airplanes:
(a) 300 feet for precision instrument runways.
(b) 250 feet for other runways serving small
　
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