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Jon, To help put this whole pinger/passive sonar/underwater communications thing in easy to understand terms...You must first understand that I sometimes have trouble staying the course or rather staying focused...This is to say that this project has evolved into a system to incorporate most of all of these functions into a single sonar console. We started with basic idea of developing a passive hydrophone for collision avoidance purposes. This in turn evolved into a two way communications console with passive sonar capability. The passive sonar feature would be the normal mode of operation when communications were not being utilized. This is exactly what has been developed and is currently being tested by both Les and Frank. Not only does this system provide a degree of collision avoidance safety not before available to small private submarines, but allows for the broadband voice communications between two submerged submarines or between a submerged submarine and its support surface craft. The "acoustical pinger" I am afraid has fallen to the wayside by our small research group, and will most probably be developed at some point in the future or we will rely on products already available on the open market to perform this function. (It would not be cost effective to retrofit these consoles with this added feature at some later date) David Bartsch > Date: Mon, 9 Feb 2009 12:30:09 -0500 > From: jonw@psubs.org > To: dbartsch2236@hotmail.com > Subject: Re: schematic > > Dave, > > Not sure about the acrylic numbers regarding Les's submersible. They > typically dive in shallow water out there, but for a 29inch diameter > flat window, he'd need about 3 inches thick to go 90feet according to > Stachiw. There's a lot of safety factor in that however. The > projected failure depth is over 500 feet. If he's only looking at 1inch > thick material or something, then he's asking for trouble. > > I will scan the schematic as soon as I can. But I think a separate > project page is warranted for this. It's not clear to me that the > "passive sonar" page is applicable to what Les is testing. Perhaps I'm > confused, but I thought the passive sonar project was essentially still > a pinger project. It sounds like the unit Les has is a communicator, > not just a pinger. So perhaps a separate project page called > "underwater comms" or something like that. > > I think you should sort through all your photos for the communicator > only, and upload those to show the work as it progressed. Then I can > upload the schematic which should be the last item. > > Jon > See how Windows connects the people, information, and fun that are part of your life. See Now |