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RE: [PSUBS-MAILIST] teathers

I might know a way to relocate a specific spot rather cheaply...
 
Since the sound emmitted from a depth sounder will be bounced off extreme changes in medium such a rock from water, what better way to reflect this sound than the difference between water and air?
 
With the previously mentioned tether wire, attach a small object filled with air. This object will pull this tether wire up and give a fairly good return. Once located, simply follow this wire down to the intended search spot.


From: brenthartwig@hotmail.com
To: personal_submersibles@psubs.org
Subject: RE: [PSUBS-MAILIST] teathers
Date: Mon, 14 Jan 2008 19:59:57 -0800

Dean                         "Do you know of an inexpensive solution to the communications?"

On the cheap, try Morse code with bubbles. ;)'  I think smoke signals are out of the question unless you can inject smoke into the bubbles. Sending bubbles back down, well I haven't figured that one out just yet. Perhaps supper cavitation will be the path to follow. Then you have the whole trouble with bubbles splitting some times as they get bigger on accent. That just might make your message sound like it's coming up in Spanish.   

Ya I know,  I should surface more often and clear the air in my sub.

Cheers,
Brent



From: Recon1st@aol.com
Date: Mon, 14 Jan 2008 20:18:23 -0500
Subject: Re: [PSUBS-MAILIST] teathers
To: personal_submersibles@psubs.org

Craig, the tether has bothered me from the beginning. I will be looking for unknown shipwrecks
etc. in Lake Superior, as my main object of exploration. I have been planning on running as
far off the bottom, as water conditions will allow. And one problem in these waters, is nothing
deteriorates. The hemp rope etc. that went down 100yrs ago is as strong as ever (scary) I have
even thought about putting cutters all over, to hack my way free.
 
From what I can find out water clarity is exceptional in open water on Superior, so was
hoping to stay at least 30' up with forward sonar for obstacles.
 
For initial cost concerns, wouldn't an array of small inexpensive fish sonar's give tracking data
to the surface support boat. Naturally it would have to be many to give direction, but these
can be purchased for a few hundred and I think should do the job. Look kinda crazy with 8
or so fish finders on the bridge
 
Also the communications are a concern. I have seen quite expensive dive types that are
not very good and 350' working depth is a problem. Do you know of an inexpensive solution
to the communications?



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