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Aeronautical Information Manual (AIM), page 695

5/26/16
12/10/15

RADAR SEPARATION-
(See RADAR SERVICE.)

RADAR SERVICE- A term which encompasses one
or more of the following services based on the use of

radar which can be provided by a controller to a pilot
of a radar identified aircraft.
a. Radar Monitoring- The radar flight-following
of aircraft, whose primary navigation is being
performed by the pilot, to observe and note deviations
from its authorized flight path, airway, or route.
When being applied specifically to radar monitoring
of instrument approaches; i.e., with precision
approach radar (PAR) or radar monitoring of
simultaneous ILS,RNAV and GLS approaches, it
includes advice and instructions whenever an aircraft
nears or exceeds the prescribed PAR safety limit or
simultaneous ILS RNAV and GLS no transgression
zone.
(See ADDITIONAL SERVICES.)
(See TRAFFIC ADVISORIES.)
b. Radar Navigational Guidance- Vectoring
aircraft to provide course guidance.
c. Radar Separation- Radar spacing of aircraft in
accordance with established minima.
(See ICAO term RADAR SERVICE.)
RADAR SERVICE [ICAO]- Term used to indicate
a service provided directly by means of radar.
a. Monitoring- The use of radar for the purpose of
providing aircraft with information and advice
relative to significant deviations from nominal flight
path.
b. Separation- The separation used when aircraft
position information is derived from radar sources.
RADAR SERVICE TERMINATED- Used by ATC
to inform a pilot that he/she will no longer be
provided any of the services that could be received
while in radar contact. Radar service is automatically
terminated, and the pilot is not advised in the
following cases:
a. An aircraft cancels its IFR flight plan, except
within Class B airspace, Class C airspace, a TRSA,
or where Basic Radar service is provided.
b. An aircraft conducting an instrument, visual, or
contact approach has landed or has been instructed to
change to advisory frequency.
c. An arriving VFR aircraft, receiving radar
service to a tower-controlled airport within Class B
Pilot/Controller Glossary

airspace, Class C airspace, a TRSA, or where
sequencing service is provided, has landed; or to all
other airports, is instructed to change to tower or
advisory frequency.

d. An aircraft completes a radar approach.

RADAR SURVEILLANCE- The radar observation
of a given geographical area for the purpose of
performing some radar function.
RADAR TRAFFIC ADVISORIES- Advisories
issued to alert pilots to known or observed radar
traffic which may affect the intended route of flight
of their aircraft.
(See TRAFFIC ADVISORIES.)
RADAR TRAFFIC INFORMATION SERVICE-
(See TRAFFIC ADVISORIES.)

RADAR VECTORING [ICAO]- Provision of
navigational guidance to aircraft in the form of
specific headings, based on the use of radar.
RADIAL- A magnetic bearing extending from a
VOR/VORTAC/TACAN navigation facility.
RADIO-
a. A device used for communication.
b. Used to refer to a flight service station; e.g.,
"Seattle Radio" is used to call Seattle FSS.
RADIO ALTIMETER- Aircraft equipment which
makes use of the reflection of radio waves from the
ground to determine the height of the aircraft above
the surface.
RADIO BEACON-
(See NONDIRECTIONAL BEACON.)
RADIO DETECTION AND RANGING-
(See RADAR.)
RADIO MAGNETIC INDICATOR- An aircraft
navigational instrument coupled with a gyro compass
or similar compass that indicates the direction of a
selected NAVAID and indicates bearing with respect
to the heading of the aircraft.
RAIS-
(See REMOTE AIRPORT INFORMATION
SERVICE.)
RAMP-
(See APRON.)
RANDOM ALTITUDE- An altitude inappropriate
for direction of flight and/or not in accordance with
FAAO JO 7110.65, Para 4-5-1, VERTICAL
SEPARATION MINIMA.

PCG R-3

Page 695 of the Aeronautical Information Manual (AIM.pdf)
AIM: Official Guide to Basic Flight Information and ATC Procedures

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