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Re: Allied technology against U-Boats
Posted by: Adrian Waygood ()
Date: January 28, 2002 10:11AM

<HTML>One of the most important uses of technology against the U-boat was the H2S radar system, which provided a PPI image of the terrain beneath the aeroplane. Unfortunately, a decision was made to supply new H2S sets to RAF Bomber Command before supplyin them to RAF Coastal Command, which meant that the Germans might retrieve H2S equipment from a downed bomber, realise that it could be used against U-boats, and install sensors which would enable the U-boats to be made aware of the presence of a H2S aeroplane. To overcome this possibility, British scientific intelligence came up with a plan to make the Germans think that their increased success-rate agains U-boats was thanks to new infra-red technology, and not radar (or Enigma decodes). This appeared to have worked, because the Germans started to coat their black-painted submarines with a semi-transparent glass-like coating. This had the effect of making the submarine appear grey (against a grey sea) to the eye, but (thanks to the refractive index of the coating) allowed infra-red to pass through the coating and be abosorbed by the black paint, thus appearing (to the infrared detector) as a black submarine on a black background!</HTML>

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Subject Written By Posted
Allied technology against U-Boats Antonio Veiga 12/11/2001 09:24PM
Re: Allied technology against U-Boats james stewart 12/11/2001 09:43PM
Re: Allied technology against U-Boats Antonio Veiga 12/11/2001 10:16PM
Re: Allied technology against U-Boats Adrian Waygood 01/28/2002 10:11AM
Re: Allied technology against U-Boats james stewart 12/11/2001 09:43PM
Are you certain it was based on Hedgehog? Forest 12/12/2001 04:12AM
Re: Yes I am Antonio Veiga 12/12/2001 07:11PM
Re: Allied technology against U-Boats Jack 12/12/2001 06:48PM
Re: Allied technology against U-Boats james stewart 12/12/2001 08:29PM
Re: Allied technology against U-Boats Ragnar J. Ragnarsson 12/13/2001 09:15AM
Re: IJN MAD aircraft kurt 12/13/2001 12:16PM
Re: IJN MAD aircraft Antonio Veiga 12/13/2001 09:00PM
Re: Allied technology against U-Boats Antonio Veiga 12/13/2001 08:55PM


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