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This is the place to discuss general issues related to the U-boat war or the war at sea in WWII. 
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RE: Sound heads
Posted by: joe brandt ()
Date: May 03, 2001 07:19PM

<HTML>Sound location was done by 11 ( later 24 ) circular sound receivers arrainged in a semi circle on each side of the forward hydroplanes . This was called GHG or GRUPPENHORCHGERÄT -GROUP LISTENING DEVICE . Early war type 7\'s also had a rotating device on the foward deck called KDB or KRISTALLDREHBASIS GERÄT-. Very few late war type 7\'s had the BALKON GERÄT listening device added but was standard on the type XXI , this was a big bulbus device that had 24 receivers with 2 diaphrams each , it could detect sounds all around the boat except an approx 60 degree arc directly aft of the boat.</HTML>

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Subject Written By Posted
Sound heads Frank 05/03/2001 03:08PM
RE: Sound heads joe brandt 05/03/2001 07:19PM
RE: Sound heads joe brandt 05/04/2001 07:20PM


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