Quote:
Originally Posted by geosub1978
Goodmorning!
I wonder if there is any kind of information about the pre-GHG listening devices.
I have heard about a sort of ATLAS hydrophones but I have never had more details about it. So, if anyone can provide something about that, it would be very much appreciated!
Thank you!
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http://www.cdvandt.org/GHG1996.pdf
The pdf has an email address. Perhaps you can write to the author and ask him.