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A term used to inform the controller that the aircraft is identified and approval is granted for the aircraft to enter the receiving controller's airspace.

RADAR CONTACT (ICAO) - The situation which exists when the radar blip of a particular aircraft is seen and identified on a radar display.
RADAR CONTACT LOST - Used by Air Traffic Control to inform a pilot that radar 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 transponder, or failure of the ground radar equipment. (See Clutter, Radar Contact)
RADAR ENVIRONMENT - An area in which radar service may be provided. (See Radar Contact, Radar Service, Additional Services, Traffic Advisories)
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. (See Radar Contact, Radar Service)
RADAR IDENTIFICATION (P/CG) - The process of ascertaining that an observed radar target is the radar return from a particular aircraft. (See Radar Contact, Radar Service)
RADAR IDENTIFICATION (ICAO) - The process of correlating a particular radar blip with a specific aircraft.
RADAR IDENTIFIED AIRCRAFT - An aircraft, the position of which has been correlated with an observed target or symbol on the radar display. (See Radar Contact, Radar Contact Lost)
RADAR MONITORING - (See Radar Service)
RADAR MONITORING (ICAO) - The use of radar for the purpose of providing aircraft with information and advice relative to significant deviations from nominal flight path.
RADAR NAVIGATIONAL GUIDANCE - (See Radar Service)
RADAR POINT OUT/POINT OUT - Used between controllers to indicate radar handoff action where the initiating controller plans to retain communications with an aircraft penetrating the other controller's airspace and additional coordination is required.
RADAR REQUIRED - A term displayed on charts and approach plates and included in Flight Data Center 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 navigational aid. The pilot can expect to be provided radar navigational guidance while transiting segments labeled with this term. (See Radar Route and Radar Service)
RADAR ROUTE - A flight path or route over which an aircraft is vectored. Navigational guidance and altitude assignments are provided by Air Traffic Control. (See Flight Path, Route)
RADAR SEPARATION - (See Radar Service)
RADAR SERVICE (P/CG) - 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.