the Aviation Dictionary

R . radar monitoring
R
rabbet - A groove cut into the edge or face of a board
so that another board or panel can be fitted into it.
Allows a T- or L-shaped assembly to be constructed.
rabbet plane - A woodworking tool used to create
rabbets in a surface.
radar altitude - Distance from the ground determined
by radar altimeter, which makes use of the reflection of
radio waves from the ground.
radar approach - An instrument approach procedure
that utilizes Precision Approach Radar (PAR) or
Airport Surveillance Radar (ASR).
radar approach control facility - A terminal ATC
facility that uses radar and nonradar capabilities to
race - A grooved, hardened, and polished steel surface provide approach control services to aircraft arriving,
on which a bearing is supported.
departing, or transiting airspace controlled by the
racetrack procedure (ICAO)- A procedure designed facility.
to enable the aircraft to reduce altitude during the a. Provides radar ATC services to aircraft operating
initial approach segment and/or establish the aircraft in the vicinity of one or more civil and/or military
inbound when the entry into a reversal procedure is not airports in a terminal area. The facility can provide
practical.
services of a ground controlled approach (GCA); i.e.,
ASR and PAR approaches. A radar approach control
rack - A straight piece of metal that has teeth cut into facility can be operated by FAA, USAF, US Army,
one side.
USN, USMC, or jointly by FAA and a military service.
rack and pinion - A set ofgears arranged in a way b. Specific facility nomenclatures are used for
that a rotary motion of the pinion gear is changed into administrative purposes only and are related to the
linear motion of the rack.
physical location of the facility and the operating
service generally as follows:
rack and pinion actuator - A rotary actuator in which 1) Army Radar Approach Control (ARAC)
the fluid acts on the rack of gear teeth cut on a piston. (Army).
As the piston moves it rotates a mating pinion gear. 2) Radar Air Traffic Control Facility (RATCF)
radar - A device that, by measuring the time interval (NavyIFAA).
between transmission and reception of radio pulses and 3, Radar Approach Control (RAPCON) (Air
correlating the angular orientation of the radiated ForcefFAA).
antenna beam or beams in azimuth andlor elevation, 4, Terminal Radar Approach Control (TRACON)
provides information on range, azimuth, and/or (FAA).
elevation of objects in the path of the transmitted ') Air Traffic Control Tower (ATCT) (FAA).
pulses.
(Only those towers delegated approach control
a. Primary Radar - A radar system in which a authority.)
minute portion of a radio pulse transmitted from a site radar beacon transponder - An electronic device that
is reflected by an object and then received back at that receives an interrogation or transmission from ground
site for processing and display at an air traffic control radar and responds with a coded transmission that
facility.
appears on the traffic controller's radar scope.
b. Secondary Radarmadar Beacon (Air Traffic
Control Radar Beacon System (ATCRBS))- A radar mlar beam - A narrow beam of electromagnetic
system in which the object to be detected is fitted with radiation used in radar units to determine distance,
cooperative equipment in the form of a radio height, size, and composition of desired target items.
receiverltransmitter (transponder). Radar pulses radar contact - Term used by ATC to advise a pilot
transmitted from the searching transmitterlreceiver that the aircraft is identified on radar.
(interrogator) site are received in the cooperative
and used to trigger a distinctive radar echo - The returning radar signal that is reflected
transmission from the transponder. This reply from an object.
transmission, rather than a reflected signal, is then radar identified aircraft - aircraft, the position of
received back at the transmitter/receiver site for which has been correlated with an observed target or
processing and display at an air traffic control facility. symbol on the radar display.
radar advisory - Information or advice provided to radar monitoring - ~h~ radar flight-following of
pilots based on radar observations.
aircraft, whose primary navigation is being performed
radar altimeter - Aircraft equipment that makes use of by the pilot, to observe and note deviations from its
the reflection of radio waves from the ground to authorized flight path, airway, or route. When being
determine the height of the aircraft above the surface. applied specifically to radar monitoring of instrument
approaches; i.e., with precision approach radar (PAR)
or radar monitoring of simultaneous ILSIMLS
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