<html><body><span style="font-family:Verdana; color:#000000; font-size:10pt;"><div>Very good information! Thanks Sean! Does anyone know what the requirements are to keep a ABS certification current and what it costs?</div>
<div> </div>
<div>Thanks,<BR>Scott Waters </div>
<div> </div>
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<DIV id=wmQuoteWrapper>-------- Original Message --------<BR>Subject: Re: [PSUBS-MAILIST] Specs question<BR>From: "Sean T. Stevenson via Personal_Submersibles"<BR><<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><BR>Date: Tue, August 04, 2015 8:38 am<BR>To: Personal Submersibles General Discussion<BR><<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><BR><BR>
<div dir=ltr>Design depth is the maximum permissible operating depth per design of the vessel, which will be some factor of safety smaller than the critical, or earliest anticipated failure depth. This is specified by the designer and drives the vessel design.</div>
<div dir=ltr>Operating depth can be equal to the design depth, or shallower, as it is typically the greatest depth within the design depth to which the vessel has been certified (tested in the presence of the surveyor). Operating depth may also be a de-rating of a previously certified depth for various reasons. PSubs obviously don't typically go through all of the certification procedure, but may be tested unmanned, in which case the successful test depth would constitute the operating depth.</div>
<div dir=ltr>Sean<BR></div><BR><BR>
<DIV class=gmail_quote>On August 4, 2015 10:00:02 AM CDT, via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:
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<DIV>What is the difference between design depth and operational depth? How do you come up with those numbers?</DIV>
<DIV> </DIV>
<DIV>Thanks,</DIV>
<DIV>Scott Waters</DIV></SPAN>
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