Cave Light - what was it?

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WATU

Airman 1st Class
239
148
Sep 1, 2019
A Coastal Command ASW committee in July 1942 referred to a "Cave Light" with a theoretical range of 600 yards but maybe a practical range of only 300 yards. By context it was a lightweight competitor to the Leigh Light - an airborne searchlight for illuminating U-boats to allow night attacks. There is no obvious link with the Helmore/Turbinlite searchlight nor the later Pumpkin.
A Flying Officer Cave from 502 Squadron was a committee member. 502 was often asked to carry out trials of new kit. Two months before Cave had described his experiments with beam and forward ASV aerials and was clearly technically capable.
The Cave Light does not appear in the next few committee minutes nor in anything else I have seen.
Can anyone provide information about it please?
 

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