8/15/19  Pilot/Controller Glossary  RADAR BEACON- RADAR CONTACT- (See RADAR.)  RADAR CLUTTER [ICAO]- The visual indication  on a radar display of unwanted signals.  a.  Used by ATC to inform an aircraft that it is  identified using an approved ATC surveillance  source on an air traffic controller's display and that  radar flight following will be provided until radar  service is terminated. Radar service may also be  provided within the limits of necessity and capability.  When a pilot is informed of “radar contact,” he/she  automatically discontinues reporting over compuls- ory reporting points.  b.  The term used to inform the controller that the  aircraft is identified and approval is granted for the  aircraft to enter the receiving controllers airspace.  (See ICAO term RADAR CONTACT.)  RADAR CONTACT [ICAO]- The situation which  exists when the radar blip or radar position symbol of  a particular aircraft is seen and identified on a radar  display.  RADAR CONTACT LOST- Used by ATC to inform  a pilot that the surveillance data used to determine the  aircraft's position is no longer being received, or is no  longer reliable and radar service is no longer being  provided. The loss may be attributed to several  factors including the aircraft merging with weather or  ground clutter, the aircraft operating below radar line  of sight coverage, the aircraft entering an area of poor  radar return, failure of the aircraft's equipment, or  failure of the surveillance equipment.  RADAR FLIGHT FOLLOWING- The observation  of the progress of radar-identified aircraft, whose  primary navigation is being provided by the pilot,  wherein the controller retains and correlates the  aircraft identity with the appropriate target or target  symbol displayed on the radar scope.  RADAR IDENTIFICATION- The process of  ascertaining that an observed radar target is the radar  return from a particular aircraft.  RADAR IDENTIFIED AIRCRAFT- An aircraft, the  position of which has been correlated with an  observed target or symbol on the radar display.  RADAR NAVIGATIONAL GUIDANCE- (See RADAR SERVICE.)  RADAR POINT OUT- An action taken by a  controller to transfer the radar identification of an  aircraft to another controller if the aircraft will or may  enter the airspace or protected airspace of another  controller and radio communications will not be  transferred.  RADAR REQUIRED- A term displayed on charts  and approach plates and included in FDC NOTAMs  to alert pilots that segments of either an instrument  approach procedure or a route are not navigable  because of either the absence or unusability of a  NAVAID. The pilot can expect to be provided radar  navigational guidance while transiting segments  labeled with this term.  RADAR ROUTE- A flight path or route over which  an aircraft is vectored. Navigational guidance and  altitude assignments are provided by ATC.  RADAR SERVICE- A term which encompasses one  or more of the following services based on the use of  RADAR SEPARATION- RADAR MONITORING- (See ATC SURVEILLANCE SOURCE.)  (See RADAR CONTACT LOST.)  (See RADAR FLIGHT FOLLOWING.)  (See RADAR SERVICE.)  (See RADAR SERVICE TERMINATED.)  (Refer to AIM.)  (See RADAR CONTACT.)  (See RADAR SERVICE.)  (Refer to AIM.)  (See RADAR CONTACT.)  (See RADAR SERVICE.)  (See RADAR CONTACT.)  (See RADAR CONTACT LOST.)  (See RADAR SERVICE.)  (See RADAR ROUTE.)  (See RADAR SERVICE.)  (See FLIGHT PATH.)  (See ROUTE.)  (See RADAR SERVICE.)  (See CLUTTER.)  (See RADAR CONTACT.)  RADAR ENVIRONMENT- An area in which radar  service may be provided.  (See ADDITIONAL SERVICES.)  (See RADAR CONTACT.)  (See RADAR SERVICE.)  (See TRAFFIC ADVISORIES.)  PCG R-2 