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Pilot/Controller Glossary 

4/20/23 

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 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

CONTROLLED (RC)

 The use of control signals transmitted radio to a remotely controlled device, 

as in radio

controlled model airplanes. 

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.) 

PCG R