The Rebecca/Eureka transponding radar was a short-range radio navigation system used for the dropping of airborne forces and their supplies. It consisted of two parts, the Rebecca airborne transceiver
Sgt. William T. Alexander, flight engineer, with B-24D#42-63980 of the 858th BS, 801st/492nd BG "Carpetbaggers" in 1944, showing Yagi antenna for Rebecca transceiver
Mk. IV-equipped Bristol Beaufighter
US Navy Rebecca/Eureka transponding radar training sketch
Airborne Long Wave Rebecca Responsor training sketch
Radar display
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A radar display is an electronic device that presents radar data to the operator. The radar system transmits pulses or continuous waves of electromagnetic radiation, a small portion of which backscatt
Rebecca/Eureka transponding radar
…of radar. During 1940, Brown had led development of a new version of the AI Mk. IV radar that included a pilot's indicator, better known today as a C-scope. This display directly represented the relative position between the fighter and its target, as if the pilot were looking through a gunsight. It was…
An airport surveillance radar display
Chain Home is the canonical A-scope system. This image shows several target "blips" at ranges between 15 and 30 miles from the station. The large blip on the far left is the leftover signal from the radar's own transmitter; targets in this area could not be seen. The signal is inverted to make measurement simpler.
The L-scope was basically two A-scopes placed side by side and rotated vertically. By comparing the signal strength from two antennas, the rough direction of the blip could be determined. In this case there are two blips, a large one roughly centred and a smaller one far to the right.
This image shows a modern PPI display in use, with the islands and ground surrounding the ship in green.