radar contact


Also found in: Acronyms.

radar contact

[′rā‚där ‚kän‚takt]
(engineering)
Recognition and identification of an echo on a radar screen; an aircraft is said to be on radar contact when its radar echo can be seen and identified on a PPI (plan-position indicator) display.

radar contact

i. The situation which exists when the radar position of a particular aircraft is seen and identified on a radar display (ICAO). The term is used by air traffic control (ATC) to inform an aircraft that it has been identified on the radar display and that radar flight following will be provided until radar identification is terminated. Radar service may also be provided within the limits of necessity and capability. When a pilot is informed of radar contact, he or she automatically discontinues reporting compulsory reporting points. The term is used to inform crew that the aircraft is identified and approval is granted for the aircraft to enter the receiving controller's airspace. The term radar identified is also used.
ii. The term as used by interceptor aircraft means that the target aircraft is on the scope.
radar contact lost
i. A term used by air traffic control (ATC) to inform a pilot that the radar data used to determine the aircraft's position are no longer available. The loss may be attributed to several factors, including the aircraft's merging with weather or ground clutter, the aircraft's operating below the radar's line-of-sight coverage, the aircraft's entering the area of poor radar return, the aircraft's transponder failing, or the radar ground equipment failing.
ii. When used by an interceptor aircraft, it means that the target aircraft is no longer on the radarscope. It may be because the target has moved out of the field of view of the interceptor radar or out of the range of radar pickup, or any other reason.
References in periodicals archive ?
Shortly before radio and radar contact were lost, the flight was at 5400 feet msl with its destination in sight.
Steaming away at 31 knots, the Zerstorer passed through another British minefield while Haida circumvented it, losing radar contact, but regaining the enemy vessel 20 minutes later.
Only once radar contact is established and a heading issued will they take responsibility.
Searchers discovered the wreckage after radar contact with the aircraft was lost earlier in the day.
A search was launched after radar contact with the plane was lost at 1.
Air Algerie flight AH5017 disappeared from radar contact while flying from Ouagadougou in Burkina Faso to Algiers, with authorities losing contact with the passenger jet around an hour after it took off from Burkina Faso.
Radar contact with the crew was lost 50 minutes after takeoff from Ouagadougou, Burkina Faso, at 1:47 am Thursday, Fabius said.
Radar contact was lost shortly after the pilot was asked to change course in poor visibility to avoid the risk of a collision with another aircraft.
One of the big questions with MH370 is the fact that they lost radar contact with the airplane and we had no other way of tracking that aircraft," said 9NEWS aviation expert Greg Feith.
The new information is based on continuing analysis of radar data between the South China Sea and the Strait of Malacca before radar contact was lost (with the missing plane)," AMSA said.
After a five-hour delay between the last radar contact with the plane and the first official word that it was missing, officials waited another three days before admitting that their military had tracked it flying west across the Malaysian peninsula away from the initial presumed crash site.
Theoretically, 23,000 feet (7,000 metres) and 45,000 feet are a cell range that terrestrial mobile network could work with,'' said Singapore-based telecommunications consultant Koh Chee Koon, referring to unconfirmed reports of changes in the plane's altitude after it lost radar contact.

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