Pilot/Controller Glossary  8/15/19  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  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.)  RADIAL- A magnetic bearing extending from a  VOR/VORTAC/TACAN navigation facility.  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.  RANDOM ALTITUDE- An altitude inappropriate  for direction of flight and/or not in accordance with  FAA Order JO 7110.65, Paragraph 4-5-1, VER- TICAL SEPARATION MINIMA.  RANDOM ROUTE- Any route not established or  charted/published or not otherwise available to all  users.  RAIS- RAMP- (See REMOTE AIRPORT INFORMATION  SERVICE.)  (See APRON.)  (See ROAD RECONNAISSANCE.)  RC- 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.  RADIO BEACON- RADIO DETECTION AND RANGING- (See RADAR.)  (See NONDIRECTIONAL BEACON.)  RADIO- RADAR VECTORING [ICAO]- Provision of  navigational guidance to aircraft in the form of  specific headings, based on the use of radar.  (See TRAFFIC ADVISORIES.)  RADAR TRAFFIC INFORMATION SERVICE- PCG R-3 