Stephen,
It seems to me the original question was for "precise" underwater navigation. So I suspect Jay is talking about pulse beacons on the seafloor of some type. I will defer to his expertise to elaborate but, I remember reading about an expedition to pacific thermal vents using this method.
I can tell you that as a diver, even with GPS to guide the boat, I have returned to many a same dive site only to have some trouble finding my target again, especially small ones.
My Octopus, as a self reliant vessel, would only leave periscope depth in sound phone contact with a surface escort to keep tabs on traffic, and will navigate in known waters, on compass and depth finder (an acoustic device). Someone with a research or salvage capable craft needs more capability.
It would be interesting to hear from Dan H, as to how he navigates his K350?
Joe
From: "Stephen Pearce" <sjpearceqld@bigpond.com>
Reply-To: personal_submersibles@psubs.org
To: <personal_submersibles@psubs.org>
Subject: [PSUBS-MAILIST] Acoustic Triangulation
Date: Sat, 8 Apr 2006 20:16:23 +1000
I thought this might be better as a separate string!
Jay K Jeffries wrote: ?Let?s get a grasp on reality here, it is obvious that many here haven?t spent a whole lot of time underwater whether scuba diving or in a submarine or
Submersible.?
and ?Probably the most economical solution is acoustic triangulation.?
As there seams to be a desire and maybe even a trend towards larger subs (UC3, Euronaut, Spurdog and possibly others on the drawing board) can you expand on your ideal system utilizing acoustic triangulation. Enquiring minds and all that?..
Regards
Steve P
OWSI, 107386