General Discussions  
This is the place to discuss general issues related to the U-boat war or the war at sea in WWII. 
Go to: Forum List•Message List•New Topic•Search•Log In•Print View
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>

Options: Reply•Quote


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


Go to: Forum List•Message List•Search•Log In
Your Name: 
Subject: 
Spam prevention:
Please, enter the code that you see below in the input field. This is for blocking bots that try to post this form automatically.
 **     **  ********  **     **  **     **  ********  
  **   **   **        **     **   **   **   **     ** 
   ** **    **        **     **    ** **    **     ** 
    ***     ******    **     **     ***     **     ** 
   ** **    **        **     **    ** **    **     ** 
  **   **   **        **     **   **   **   **     ** 
 **     **  ********   *******   **     **  ********