[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

RE: [PSUBS-MAILIST] Acoustic Triangulation

As noted, navigation underwater is pretty primitive.  To elaborate on what Joe has said, if you know the two end points you try to dry between them moving with the current.  Remember that surface current and bottom current is often different and in deep water there may even be another directional current mid-depth.


If you don’t know the end points but know the orientation (if it has some length) and approximate location, search theory states the most likelihood of finding your target is to try to cross it at a 90 deg. angle.



From: owner-personal_submersibles@psubs.org [mailto:owner-personal_submersibles@psubs.org] On Behalf Of Joseph Perkel
Sent: Saturday, April 08, 2006 2:53 PM
To: personal_submersibles@psubs.org
Subject: Re: [PSUBS-MAILIST] Acoustic Triangulation



"two positions in the log, defining the fore and aft extents of the wreck."

Amazing how the simplest of solutions elude a person,...that never occurred to me. I suppose you pick up little tricks like that the more serious your diving becomes. I became certified in 1977 but, never ventured into anything more serious than shallow wrecks and reefs, in S. Florida, you have a lot to see in the no decomp range. Neat trick!


************************************************************************ ************************************************************************ ************************************************************************ 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 311 Weare, NH 03281 603-529-1100 ************************************************************************ ************************************************************************ ************************************************************************