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System (ATCRBS). Mode A (military Mode 3) and
Mode C (altitude reporting) are used in air traffic
control.
(See INTERROGATOR.)
(See RADAR.)
(See TRANSPONDER.)
(See ICAO term MODE.)
(Refer to AIM.)
MODE (SSR MODE) [ICAO]- The letter or number
assigned to a specific pulse spacing of the
interrogation signals transmitted by an interrogator.
There are 4 modes, A, B, C and D specified in Annex
10, corresponding to four different interrogation
pulse spacings.
MODE C INTRUDER ALERT- A function of
certain air traffic control automated systems designed
to alert radar controllers to existing or pending
situations between a tracked target (known IFR or
VFR aircraft) and an untracked target (unknown IFR
or VFR aircraft) that requires immediate attention/
action.
(See CONFLICT ALERT.)
MONITOR- (When used with communication
transfer) listen on a specific frequency and stand by
for instructions. Under normal circumstances do not
establish communications.
MONITOR ALERT (MA)- A function of the ETMS
that provides traffic management personnel with a
tool for predicting potential capacity problems in
individual operational sectors. The MA is an
indication that traffic management personnel need to
analyze a particular sector for actual activity and to
determine the required action(s), if any, needed to
control the demand.
MONITOR ALERT PARAMETER (MAP)- The
number designated for use in monitor alert
processing by the ETMS. The MAP is designated for
each operational sector for increments of 15 minutes.
MOSAIC/MULTI-SENSOR MODE- Accepts posi-
tional data from multiple radar or ADS-B sites.
Targets are displayed from a single source within a
radar sort box according to the hierarchy of the
sources assigned.
MOVEMENT AREA- The runways, taxiways, and
other areas of an airport/heliport which are utilized
for taxiing/hover taxiing, air taxiing, takeoff, and
landing of aircraft, exclusive of loading ramps and
parking areas. At those airports/heliports with a
tower, specific approval for entry onto the movement
area must be obtained from ATC.
(See ICAO term MOVEMENT AREA.)
MOVEMENT AREA [ICAO]- That part of an
aerodrome to be used for the takeoff, landing and
taxiing of aircraft, consisting of the maneuvering area
and the apron(s).
MOVING TARGET INDICATOR- An electronic
device which will permit radar scope presentation
only from targets which are in motion. A partial
remedy for ground clutter.
MRA(See MINIMUM RECEPTION ALTITUDE.)
MSA(See MINIMUM SAFE ALTITUDE.)
MSAW(See MINIMUM SAFE ALTITUDE WARNING.)
MTI(See MOVING TARGET INDICATOR.)
MTR(See MILITARY TRAINING ROUTES.)
MULTICOM- A mobile service not open to public
correspondence used to provide communications
essential to conduct the activities being performed by
or directed from private aircraft.
MULTIPLE RUNWAYS- The utilization of a
dedicated arrival runway(s) for departures and a
dedicated departure runway(s) for arrivals when
feasible to reduce delays and enhance capacity.
MVA(See MINIMUM VECTORING ALTITUDE.)
Pilot/Controller Glossary 2/14/08
PCG N-1
N
NAS(See NATIONAL AIRSPACE SYSTEM.)
NATIONAL AIRSPACE SYSTEM- The common
network of U.S. 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. Included are system
components shared jointly with the military.
NATIONAL BEACON CODE ALLOCATION
PLAN AIRSPACE- Airspace over United States
territory located within the North American continent
between Canada and Mexico, including adjacent
territorial waters outward to about boundaries of
oceanic control areas (CTA)/Flight Information
Regions (FIR).
(See FLIGHT INFORMATION REGION.)
NATIONAL FLIGHT DATA CENTER- A facility in
Washington D.C., established by FAA to operate a
central aeronautical information service for the
collection, validation, and dissemination of aeronau-
tical data in support of the activities of government,
industry, and the aviation community. The informa-
tion is published in the National Flight Data Digest.
(See NATIONAL FLIGHT DATA DIGEST.)
NATIONAL FLIGHT DATA DIGEST- A daily
(except weekends and Federal holidays) publication
of flight information appropriate to aeronautical
charts, aeronautical publications, Notices to Airmen,
or other media serving the purpose of providing
operational flight data essential to safe and efficient
aircraft operations.
NATIONAL SEARCH AND RESCUE PLAN- An
interagency agreement which provides for the
effective utilization of all available facilities in all
types of search and rescue missions.
NAVAID(See NAVIGATIONAL AID.)
NAVAID CLASSES- VOR, VORTAC, and TACAN
aids are classed according to their operational use.
The three classes of NAVAIDs are:
a. T- Terminal.
b. L- Low altitude.
c. H- High altitude.
Note:_The normal service range for T, L, and H class
aids is found in the AIM. Certain operational
requirements make it necessary to use some of
these aids at greater service ranges than
specified. Extended range is made possible
through flight inspection determinations. Some
aids also have lesser service range due to location,
terrain, frequency protection, etc. Restrictions to
service range are listed in Airport/Facility
Directory.
NAVIGABLE AIRSPACE- Airspace at and above
the minimum flight altitudes prescribed in the CFRs
including airspace needed for safe takeoff and
landing.
(Refer to 14 CFR Part 91.)
NAVIGATION REFERENCE SYSTEM (NRS)-
The NRS is a system of waypoints developed for use
within the United States for flight planning and
navigation without reference to ground based
navigational aids. The NRS waypoints are located in
a grid pattern along defined latitude and longitude
lines. The initial use of the NRS will be in the high
altitude environment in conjunction with the High
Altitude Redesign initiative. The NRS waypoints are
intended for use by aircraft capable of point-to-point
navigation.
NAVIGATIONAL AID- Any visual or electronic
device airborne or on the surface which provides
point-to-point guidance information or position data
to aircraft in flight.
(See AIR NAVIGATION FACILITY.)
NBCAP AIRSPACE(See NATIONAL BEACON CODE ALLOCATION
PLAN AIRSPACE.)
NDB(See NONDIRECTIONAL BEACON.)
NEGATIVE- “No,” or “permission not granted,” or
“that is not correct.”
NEGATIVE CONTACT- Used by pilots to inform
ATC that:
a. Previously issued traffic is not in sight. It may
be followed by the pilot's request for the controller to
provide assistance in avoiding the traffic.
b. They were unable to contact ATC on a
particular frequency.
Pilot/Controller Glossary 2/14/08
PCG N-2
NFDC(See NATIONAL FLIGHT DATA CENTER.)
NFDD(See NATIONAL FLIGHT DATA DIGEST.)
NIGHT- The time between the end of evening civil
twilight and the beginning of morning civil twilight,
as published in the American Air Almanac, converted
to local time.
(See ICAO term NIGHT.)
NIGHT [ICAO]- The hours between the end of
evening civil twilight and the beginning of morning
civil twilight or such other period between sunset and
sunrise as may be specified by the appropriate
authority.
Note:_Civil twilight ends in the evening when the
center of the sun's disk is 6 degrees below the
horizon and begins in the morning when the center
of the sun's disk is 6 degrees below the horizon.
NO GYRO APPROACH- A radar approach/vector
provided 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.
(Refer to AIM.)
NO GYRO VECTOR(See NO GYRO APPROACH.)
NO TRANSGRESSION ZONE (NTZ)- The NTZ is
a 2,000 foot wide zone, located equidistant between
parallel runway final approach courses in which
flight is not allowed.
NONAPPROACH CONTROL TOWER- Author-
izes aircraft to land or takeoff at the airport controlled
by the tower or to transit the Class D airspace. The
primary function of a nonapproach control tower is
the sequencing of aircraft in the traffic pattern and on
the landing area. Nonapproach control towers also
separate aircraft operating under instrument flight
rules clearances from approach controls and centers.
They provide ground control services to aircraft,
vehicles, personnel, and equipment on the airport
movement area.
NONCOMMON ROUTE/PORTION- That segment
of a North American Route between the inland
navigation facility and a designated North American
terminal.
NONCOMPOSITE SEPARATION- Separation in
accordance with minima other than the composite
separation minimum specified for the area con-
cerned.
NONDIRECTIONAL BEACON- 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- Taxiways and apron
(ramp) areas not under the control of air traffic.
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.
NONRADAR- Precedes other terms and generally
means without the use of radar, such as:
a. Nonradar Approach. Used to describe instru-
ment 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, and ILS/MLS 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
Pilot/Controller Glossary 2/14/08
PCG N-3
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.)
(See ICAO term NONRADAR SEPARATION.)
NONRADAR SEPARATION [ICAO]- The separa-
tion used when aircraft position information is
derived from sources other than radar.
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(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 MARK- A beacon data block sent by the
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.
NOTIC E TO AIR MEN- A notice containing
information (not known sufficiently in advance to
publicize by other means) concerning the establish-
ment, 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 disse-
mination 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
NOTIC ES TO AIR MEN PUBLIC ATION- 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 supplem ental 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 (LOCA-
TION)- A traffic advisory issued by ATC to advise
pilots that targets on the radar scope are too numerous
to issue individually.
(See TRAFFIC ADVISORIES.)
Pilot/Controller Glossary 2/14/08
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 term inal area to the
appropriate en route structure. ODPs are recom-
mended 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 run-
ways.
(b) 250 feet for other runways serving small
airplanes with approach speeds of 50 knots, or more.
(c) 120 feet for other runways serving small
airplanes with approach speeds of less than 50 knots.
b. Inner-approach OFZ. The inner-approach OFZ
is a defined volume of airspace centered on the
approach area. The inner-approach OFZ applies only
to runways with an approach lighting system. The
inner-approach OFZ begins 200 feet from the runway
threshold at the same elevation as the runway
threshold and extends 200 feet beyond the last light
unit in the approach lighting system. The width of the
inner-approach OFZ is the same as the runway OFZ
and rises at a slope of 50 (horizontal) to 1 (vertical)
from the beginning.
c. Inner-transitional OFZ. The inner transitional
surface OFZ is a defined volume of airspace along the
sides of the runway and inner-approach OFZ and
applies only to precision instrument runways. The
inner-transitional surface OFZ slopes 3 (horizontal)
to 1 (vertical) out from the edges of the runway OFZ
and inner-approach OFZ to a height of 150 feet above
the established airport elevation.
(Refer to AC 150/5300-13, Chapter 3.)
(Refer to FAAO JO 7110.65, Para 3-1-5,
VEHICLES/EQUIPMENT/PERSONNEL ON
RUNWAYS.)
OBSTRUCTION- Any object/obstacle exceeding
the obstruction standards specified by 14 CFR
Part 77, Subpart C.
OBSTRUCTION LIGHT- A light or one of a group
of lights, usually red or white, frequently mounted on
a surface structure or natural terrain to warn pilots of
the presence of an obstruction.
OCEANIC AIRSPACE- Airspace over the oceans of
the world, considered international airspace, where
oceanic separation and procedures per the Interna-
tional Civil Aviation Organization are applied.
Responsibility for the provisions of air traffic control
Pilot/Controller Glossary 2/14/08
PCG O-2
service in this airspace is delegated to various
countries, based generally upon geographic proximi-
ty and the availability of the required resources.
OCEANIC DISPLAY AND PLANNING SYS-
TEM- An automated digital display system which
provides flight data processing, conflict probe, and
situation display for oceanic air traffic control.
OCEANIC NAVIGATIONAL ERROR REPORT- A
report filed when an aircraft exiting oceanic airspace
has been observed by radar to be off course. ONER
reporting parameters and procedures are contained in
FAAO 7110.82, Monitoring of Navigational Perfor-
mance In Oceanic Areas.
OCEANIC PUBLISHED ROUTE- A route estab-
lished in international airspace and charted or
described in flight information publications, such as
Route Charts, DOD Enroute Charts, Chart Supple-
ments, NOTAMs, and Track Messages.
OCEANIC TRANSITION ROUTE- An ATS route
established for the purpose of transitioning aircraft
to/from an organized track system.
ODAPS(See OCEANIC DISPLAY AND PLANNING
SYSTEM.)
ODP(See OBSTACLE DEPARTURE PROCEDURE.)
OFF COURSE- A term used to describe a situation
where an aircraft has reported a position fix or is
observed on radar at a point not on the ATC-approved
route of flight.
OFF-ROUTE VECTOR- A vector by ATC which
takes an aircraft off a previously assigned route.
Altitudes assigned by ATC during such vectors
provide required obstacle clearance.
OFFSET PARALLEL RUNWAYS- Staggered
runways having centerlines which are parallel.
OFFSHORE/CONTROL AIRSPACE AREA- That
portion of airspace between the U.S. 12 NM limit and
the oceanic CTA/FIR boundary within which air
traffic control is exercised. These areas are
established to provide air traffic control services.
Offshore/Control Airspace Areas may be classified
as either Class A airspace or Class E airspace.
OFT(See OUTER FIX TIME.)
OM(See OUTER MARKER.)
OMEGA- An RNAV system designed for long-range
navigation based upon ground-based electronic
navigational aid signals.
ON COURSEa. Used to indicate that an aircraft is established on
the route centerline.
b. Used by ATC to advise a pilot making a radar
approach that his/her aircraft is lined up on the final
approach course.
(See ON-COURSE INDICATION.)
ON-COURSE INDICATION- An indication on an
instrument, which provides the pilot a visual means
of determining that the aircraft is located on the
centerline of a given navigational track, or an
indication on a radar scope that an aircraft is on a
given track.
ONE-MINUTE WEATHER- The most recent one
minute updated weather broadcast received by a pilot
from an uncontrolled airport ASOS/AWOS.
ONER(See OCEANIC NAVIGATIONAL ERROR
REPORT.)
OPERATIONAL(See DUE REGARD.)
OPPOSITE DIRECTION AIRCRAFT- Aircraft are
operating in opposite directions when:
a. They are following the same track in reciprocal
directions; or
b. Their tracks are parallel and the aircraft are
flying in reciprocal directions; or
c. Their tracks intersect at an angle of more than
135_.
OPTION APPROACH- An approach requested and
conducted by a pilot which will result in either a
touch-and-go, missed approach, low approach,
stop-and-go, or full stop landing.
(See CLEARED FOR THE OPTION.)
(Refer to AIM.)
ORGANIZED TRACK SYSTEM- A series of ATS
routes which are fixed and charted; i.e., CEP,
NOPAC, or flexible and described by NOTAM; i.e.,
NAT TRACK MESSAGE.
OROCA- An off-route altitude which provides
obstruction clearance with a 1,000 foot buffer in
Pilot/Controller Glossary 2/14/08
PCG O-3
nonmountainous terrain areas and a 2,000 foot buffer
in designated mountainous areas within the United
States. This altitude may not provide signal coverage
from ground-based navigational aids, air traffic
control radar, or communications coverage.
OTR(See OCEANIC TRANSITION ROUTE.)
OTS(See ORGANIZED TRACK SYSTEM.)
OUT- The conversation is ended and no response is
expected.
OUTER AREA (associated with Class C airspace)-
Nonregulatory airspace surrounding designated
Class C airspace airports wherein ATC provides radar
vectoring and sequencing on a full-time basis for all
IFR and participating VFR aircraft. The service
provided in the outer area is called Class C service
which includes: IFR/IFR-standard IFR separation;
IFR/VFR-traffic advisories and conflict resolution;
and VFR/VFR-traffic advisories and, as appropriate,
safety alerts. The normal radius will be 20 nautical
miles with some variations based on site-specific
requirements. The outer area extends outward from
the primary Class C airspace airport and extends from
the lower limits of radar/radio coverage up to the
ceiling of the approach control's delegated airspace
excluding the Class C charted area and other airspace
as appropriate.
(See CONFLICT RESOLUTION.)
(See CONTROLLED AIRSPACE.)
OUTER COMPASS LOCATOR(See COMPASS LOCATOR.)
OUTER FIX- A general term used within ATC to
describe fixes in the terminal area, other than the final
approach fix. Aircraft are normally cleared to these
fixes by an Air Route Traffic Control Center or an
Approach Control Facility. Aircraft are normally
cleared from these fixes to the final approach fix or
final approach course.
OR
OUTER FIX- An adapted fix along the converted
route of flight, prior to the meter fix, for which
crossing times are calculated and displayed in the
metering position list.
OUTER FIX ARC- A semicircle, usually about a
50-70 mile radius from a meter fix, usually in high
altitude, which is used by CTAS/HOST to calculate
outer fix times and determine appropriate sector
meter list assignments for aircraft on an established
arrival route that will traverse the arc.
OUTER FIX TIME- A calculated time to depart the
outer fix in order to cross the vertex at the ACLT. The
time reflects descent speed adjustments and any
applicable delay time that must be absorbed prior to
crossing the meter fix.
OUTER MARKER- A marker beacon at or near the
glideslope intercept altitude of an ILS approach. It is
keyed to transmit two dashes per second on a 400 Hz
tone, which is received aurally and visually by
compatible airborne equipment. The OM is normally
located four to seven miles from the runway threshold
on the extended centerline of the runway.
(See INSTRUMENT LANDING SYSTEM.)
(See MARKER BEACON.)
(Refer to AIM.)
OVER- My transmission is ended; I expect a
response.
OVERHEAD MANEUVER- A series of predeter-
mined maneuvers prescribed for aircraft (often in
formation) for entry into the visual flight rules (VFR)
traffic pattern and to proceed to a landing. An
overhead maneuver is not an instrument flight rules
(IFR) approach procedure. An aircraft executing an
overhead maneuver is considered VFR and the IFR
flight plan is cancelled when the aircraft reaches the
“initial point” on the initial approach portion of the
maneuver. The pattern usually specifies the
following:
a. The radio contact required of the pilot.
b. The speed to be maintained.
c. An initial approach 3 to 5 miles in length.
d. An elliptical pattern consisting of two 180
degree turns.
e. A break point at which the first 180 degree turn
is started.
f. The direction of turns.
g. Altitude (at least 500 feet above the convention-
al pattern).
h. A “Roll-out” on final approach not less than 1/4
mile from the landing threshold and not less than 300
feet above the ground.
Pilot/Controller Glossary 2/14/08
PCG O-4
OVERLYING CENTER- The ARTCC facility that
is responsible for arrival/departure operations at a
specific terminal.
Pilot/Controller Glossary 2/14/08
PCG P-1
P
P TIME(See PROPOSED DEPARTURE TIME.)
P-ACP(See PREARRANGED COORDINATION
PROCEDURES.)
PAN-PAN- The international radio-telephony urgen-
cy signal. When repeated three times, indicates
uncertainty or alert followed by the nature of the
urgency.
(See MAYDAY.)
(Refer to AIM.)
PAR(See PRECISION APPROACH RADAR.)
PAR [ICAO]-
(See ICAO Term PRECISION APPROACH
RADAR.)
PARALLEL ILS APPROACHES- Approaches to
parallel runways by IFR aircraft which, when
established inbound toward the airport on the
adjacent final approach courses, are radar-separated
by at least 2 miles.
(See FINAL APPROACH COURSE.)
(See SIMULTANEOUS ILS APPROACHES.)
PARALLEL MLS APPROACHES(See PARALLEL ILS APPROACHES.)
PARALLEL OFFSET ROUTE- A parallel track to
the left or right of the designated or established
airway/route. Normally associated with Area Navi-
gation (RNAV) operations.
(See AREA NAVIGATION.)
PARALLEL RUNWAYS- Two or more runways at
the same airport whose centerlines are parallel. In
addition to runway number, parallel runways are
designated as L (left) and R (right) or, if three parallel
runways exist, L (left), C (center), and R (right).
PBCT(See PROPOSED BOUNDARY CROSSING
TIME.)
PDC(See PRE-DEPARTURE CLEARANCE.)
PERMANENT ECHO- Radar signals reflected from
fixed objects on the earth's surface; e.g., buildings,
towers, terrain. Permanent echoes are distinguished
from “ground clutter” by being definable locations
rather than large areas. Under certain conditions they
may be used to check radar alignment.
PHOTO RECONNAISSANCE- Military activity
that requires locating individual photo targets and
navigating to the targets at a preplanned angle and
altitude. The activity normally requires a lateral route
width of 16 NM and altitude range of 1,500 feet to
10,000 feet AGL.
PILOT BRIEFING- A service provided by the FSS
to assist pilots in flight planning. Briefing items may
include weather information, NOTAMS, military
activities, flow control information, and other items
as requested.
(Refer to AIM.)
PILOT IN COMMAND- The pilot responsible for
the operation and safety of an aircraft during flight
time.
(Refer to 14 CFR Part 91.)
PILOT WEATHER REPORT- A report of meteoro-
logical phenomena encountered by aircraft in flight.
(Refer to AIM.)
PILOT'S DISCRETION- When used in conjunc-
tion with altitude assignments, means that ATC has
offered the pilot the option of starting climb or
descent whenever he/she wishes and conducting the
climb or descent at any rate he/she wishes. He/she
may temporarily level off at any intermediate
altitude. However, once he/she has vacated an
altitude, he/she may not return to that altitude.
PIREP(See PILOT WEATHER REPORT.)
PITCH POINT- A fix/waypoint that serves as a
transition point from a departure procedure or the low
altitude ground-based navigation structure into the
high altitude waypoint system.
PLANS DISPLAY- A display available in URET
that provides detailed flight plan and predicted
conflict information in textual format for requested
Current Plans and all Trial Plans.
(See USER REQUEST EVALUATION TOOL.)
Pilot/Controller Glossary 2/14/08
PCG P-2
POFZ(See PRECISION OBSTACLE FREE ZONE.)
POINT OUT(See RADAR POINT OUT.)
POINT-TO-POINT (PTP)- A level of NRR service
for aircraft that is based on traditional waypoints in
their FMSs or RNAV equipage.
POLAR TRACK STRUCTURE- A system of
organized routes between Iceland and Alaska which
overlie Canadian MNPS Airspace.
POSITION AND HOLD- Used by ATC to inform a
pilot to taxi onto the departure runway in takeoff
position and hold. It is not authorization for takeoff.
It is used when takeoff clearance cannot immediately
be issued because of traffic or other reasons.
(See CLEARED FOR TAKEOFF.)
POSITION REPORT- A report over a known
location as transmitted by an aircraft to ATC.
(Refer to AIM.)
POSITION SYMBOL- A computer-generated
indication shown on a radar display to indicate the
mode of tracking.
POSITIVE CONTROL- The separation of all air
traffic within designated airspace by air traffic
control.
PRACTICE INSTRUMENT APPROACH- An
instrument approach procedure conducted by a VFR
or an IFR aircraft for the purpose of pilot training or
proficiency demonstrations.
PRE-DEPARTURE CLEARANCE- An application
with the Terminal Data Link System (TDLS) that
provides clearance information to subscribers,
through a service provider, in text to the cockpit or
gate printer.
PREARRANGED COORDINATION- A standard-
ized procedure which permits an air traffic controller
to enter the airspace assigned to another air traffic
controller without verbal coordination. The proce-
dures are defined in a facility directive which ensures
standard separation between aircraft.
PREARRANGED COORDINATION PROCE-
DURES- A facility's standardized procedure that
describes the process by which one controller shall
allow an aircraft to penetrate or transit another
controller's airspace in a manner that assures standard
separation without individual coordination for each
aircraft.
PRECIP ITATION- Any or all form s of water
particles (rain, sleet, hail, or snow) that fall from the
atmosphere and reach the surface. |
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发表于 2008-12-21 20:38:10
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