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This I do not know, but, if one were to investigate "fleet boats" which covers the Gato and similar diesel submarines of the US submarine fleet used during WWII, there is quite a write up on the systems used by our navy at this time. A very great read. Most systems used a pair of hydrophones that were mounted on a wide pole mounted bar. This bar was trained or turned and the two hydrophone inputs compared to each other. When both incoming signals were equal in signal strength the unit was trained on the surface contact. Crude, but it seemed to work well enough. The U 505 pictures available on line do give clear pictures of the hull mounted hydrophone array this boat used at the time. I think again that a comparison would have been made between these fixed mounted hydrophone in order to derive at a "best bearing to detected contact." David Bartsch > Subject: Re: [PSUBS-MAILIST] guide to hydrophone construction > To: personal_submersibles@psubs.org > From: abyssalobsession@gmail.com > Date: Thu, 12 Nov 2009 19:29:06 +0000 > > Out of curiosity, has anyone ever tried to acquire the schematics from early u-boat hydrophones. Surely the old patents are expired and available for review. Maybe there are some lessons to be learned. At least they would be an interesting read. > ------Original Message------ > From: Jens Laland > Sender: owner-personal_submersibles@psubs.org > To: personal_submersibles@psubs.org > ReplyTo: personal_submersibles@psubs.org > Subject: [PSUBS-MAILIST] guide to hydrophone construction > Sent: Nov 12, 2009 07:20 > > David & co > > I just found this document which contains interesting information on > construction of hydrophones: > > http://www.otago.ac.nz/marinescience/downloads/Barlow%20et%20al%202008%20HydrophoneConstruction_TM-417.pdf > > Best regards, > Jens Laland > > > > > ************************************************************************ > ************************************************************************ > ************************************************************************ > The personal submersibles mailing list complies with the US Federal > CAN-SPAM Act of 2003. Your email address appears in our database > because either you, or someone you know, requested you receive messages > from our organization. > > If you want to be removed from this mailing list simply click on the > link below or send a blank email message to: > removeme-personal_submersibles@psubs.org > > Removal of your email address from this mailing list occurs by an > automated process and should be complete within five minutes of > our server receiving your request. > > PSUBS.ORG > PO Box 53 > Weare, NH 03281 > 603-529-1100 > ************************************************************************ > ************************************************************************ > ************************************************************************ > > > > Sent from my Verizon Wireless BlackBerryN©z»(?©l¹¹ž®È›•ë&j)bž b²×(š™bzÌ"¶ayD…y׫jP€5#À0-¡ý´Óv(º·¦j)ZuÚ޲Ʃ¥æ«²)躷Zµ¦Ú±æÞq«¬yè…êò¢ê+²‰ž¢w²¢é'£ > ު笵çr¢êÞqè¯zg¬±¨ ±úèš‹«¢¸ž,Ú¶*'!ü¨»§¶Úz·¦¢÷?~º&¶¬™¨¥Šx%ŠËlŠjeÉÉbrJ'¶¥ŠyzZ0¢» ?Ö›•©äzf¢–g¬±¨ ¶ŠÞš‹Þ™ê^®Ê'j[.ng«²&åzÊl¹»(®^š‹Ú–‡ò¢êÞ™¨¥i×kzË ®‰†+&j)bž b²Ú rêìo&§jëh™«^všèqë,jwl†‹¥u·œ¢jez×°ŠØb?ø¯zh§º×¬¡ú.®Ç«½êëyÇ¢¾)àÊ‹«ê®zËOI@R9?81çužj·? Möó^´ß?½×]4 Your E-mail and More On-the-Go. Get Windows Live Hotmail Free. Sign up now. |