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marking to define the path of aircraft, traveling at high speed (up to 60 knots), from the
runway center to a point on the center of a taxiway. Also referred to as long radius exit or
turn-off taxiway. The high speed taxiway is designed to expedite aircraft turning off the
runway after landing, thus reducing runway occupancy time.
HOLDING FIX- A specified fix identifiable to a pilot by NAVAIDs or visual reference to
the ground used as a reference point in establishing and maintaining the position of an aircraft
while holding.
Radar Contact – will be identified by the controller when issued holding instructions.
ILS CATEGORIES- 1. ILS Category I. An ILS approach procedure which provides for
approach to a height above touchdown of not less than 200 feet and with runway visual range
of not less than 1,800 feet.- 2. ILS Category II. An ILS approach procedure which provides
for approach to a height above touchdown of not less than 100 feet and with runway visual
range of not less than 1,200 feet.- 3. ILS Category III:
a. IIIA.-An ILS approach procedure which provides for approach without a
decision height minimum and with runway visual range of not less than 700
feet.
b. IIIB.-An ILS approach procedure which provides for approach without a
decision height minimum and with runway visual range of not less than 150
feet.
c. IIIC.-An ILS approach procedure which provides for approach without a
decision height minimum and without runway visual range minimum.
INNER MARKER- A marker beacon used with an ILS (CAT II) precision approach located
between the middle marker and the end of the ILS runway, transmitting a radiation pattern
keyed at six dots per second and indicating to the pilot, both aurally and visually, that he/she
is at the designated decision height (DH), normally 100 feet above the touchdown zone
elevation, on the ILS CAT II approach. It also marks progress during a CAT III approach.
Radar Contact Glossary
Version 4 December 2, 2007
Copyright JDT LLC 2005 Page 284
INSTRUMENT DEPARTURE PROCEDURE (DP)- A preplanned instrument flight rule
(IFR) air traffic control departure procedure printed for pilot use in graphic and/or textual
form. DP's provide transition from the terminal to the appropriate enroute structure.
JET ROUTE- A route designed to serve aircraft operations from 18,000 feet MSL up to and
including flight level 450. The routes are referred to as "J" routes with numbering to identify
the designated route; e.g., J105.
LOCALIZER- The component of an ILS which provides course guidance to the runway.
LOCALIZER TYPE DIRECTIONAL AID (LDA)-A NAVAID used for non-precision
instrument approaches with utility and accuracy comparable to a localizer but which is not a
part of a complete ILS and is not aligned with the runway.
MIDDLE MARKER- A marker beacon that defines a point along the glide slope of an ILS
normally located at or near the point of decision height (ILS Category I). It is keyed to
transmit alternate dots and dashes, with the alternate dots and dashes keyed at the rate of 95
dot/dash combinations per minute on a 1300 Hz tone, which is received aurally and visually
by compatible airborne equipment.
MISSED APPROACH PROCEDURE - The procedure to be followed if the approach
cannot be continued.
NEGATIVE- "No," or "permission not granted," or "that is not correct."
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.
NONPRECISION APPROACH PROCEDURE- A standard instrument approach
procedure in which no electronic glide slope is provided; e.g., VOR, TACAN, NDB, LOC,
ASR, LDA, or SDF approaches.
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.
Radar Contact - NOTAM Advisories for terrain avoidance will be issued by
Clearance Delivery prior to departure and by Center on the descent for arrival.
OUTER MARKER- A marker beacon at or near the glide slope 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.
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