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Flashcards in N Deck (20):
1

N1

Rotational speed of the low pressure compressor in a turbine engine.

2

N2

Rotational speed of the high pressure compressor in a turbine engine.

3

Nacelle

A streamlined enclosure on an aircraft in which
an engine is mounted. On multiengine propeller-driven
airplanes, the nacelle is normally mounted on the leading
edge of the wing.

4

National Airspace System (NAS)

The common network of
United States airspace—air navigation facilities, equipment
and services, airports or landing areas; aeronautical charts,
information and services; rules, regulations and procedures,
technical information; and manpower and material.

5

National Aeronautical Charting Group (NACG)

A
Federal agency operating under the FAA, responsible for
publishing charts such as the terminal procedures and en
route charts.

6

National Route Program (NRP)

A set of rules and
procedures designed to increase the flexibility of user flight
planning within published guidelines.

7

National Security Area (NSA)

Areas consisting of airspace of
defined vertical and lateral dimensions established at locations
where there is a requirement for increased security and safety
of ground facilities. Pilots are requested to voluntarily avoid
flying through the depicted NSA. When it is necessary to
provide a greater level of security and safety, flight in NSAs
may be temporarily prohibited. Regulatory prohibitions are
disseminated via NOTAMs.

8

National Transportation Safety Board (NTSB)

A United
States Government independent organization responsible for
investigations of accidents involving aviation, highways,
waterways, pipelines, and railroads in the United States.
NTSB is charged by congress to investigate every civil
aviation accident in the United States.

9

NAVAID

Navigational Aid

10

NAV/COM

Navigational and communication radio.

11

Negative static stability

The initial tendency of an aircraft
to continue away from the original state of equilibrium after
being disturbed.

12

Neutral static stability

The initial tendency of an aircraft
to remain in a new condition after its equilibrium has been
disturbed.

13

NM

Nautical Mile

14

NOAA

National Oceanic and Atmospheric Administration

15

No-gyro approach

A radar approach that may be used in
case of a malfunctioning gyro-compass or directional gyro.
Instead of providing the pilot with headings to be flown,
the controller observes the radar track and issues control
instructions “turn right/left” or “stop turn,” as appropriate.

16

Nondirectional radio beacon (NDB)

A ground-based radio
transmitter that transmits radio energy in all directions.

17

Nonprecision approach

A standard instrument approach
procedure in which only horizontal guidance is provided.

18

No procedure turn (NoPT)

Term used with the appropriate
course and altitude to denote that the procedure turn is not
required.

19

Notice to Airmen (NOTAM)

A notice filed with an aviation
authority to alert aircraft pilots of any hazards en route or at
a specific location. The authority in turn provides means of
disseminating relevant NOTAMs to pilots.

20

NWS

National Weather Service