Summary: Instructional film about LRASV (Long Range Air to Surface Vessel) radar.
Description: The film recapitulates the principles of ASV as seen in an earlier film (RMY 116) and then explains the working of LRASV (Long Range Air to Surface Vessel), an extension of ASV which makes possible the location of sea targets at a greater range. A transmitting aerial attached to the top of the rear fuselage of a Wellington emits signals to port and starboard which are received by aerials attached to both sides of the plane. The narrower beam of the signal gives it greater intensity, and therefore range, than is obtainable by the sweeping forward beam of ASV. As soon as the target is located by LRASV the plane turns from port to starboard, switches to ASV and homes in on the target. A Wellington demonstrates the effectiveness of LRASV and ASV by locating first a convoy and then a U-boat which it "bombs".
Production Details: Air Ministry (Production sponsor)
B T-H Research Laboratory (Production company)
Telecommunications Research Establishment (Production company)
Personalities, Units and Organisations: Royal Air Force (regiment/service)
Keywords: aircraft, British - combat: Vickers Wellington (object name)
equipment, British air - surveillance: LRASV radar (object name)
Instruction (concept)
Physical Characteristics: Colour format: B&W
Sound format: Sound
Soundtrack language: English
Title language: English
Subtitle language: None
Technical Details: Format: 35mm
Number of items/reels/tapes: 1
Footage: 1140 ft; Running time: 13 mins
