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SCUBA-L  April 1999, Week 4

SCUBA-L April 1999, Week 4

Subject:

Re: NEDU Ratings (was Re: regulator confusion)

From:

Bjorn Vang Jensen <[log in to unmask]>

Reply-To:

Scuba diving discussion list <[log in to unmask]>

Date:

Fri, 23 Apr 1999 19:48:15 +0700

Content-Type:

text/plain

Parts/Attachments:

Parts/Attachments

text/plain (45 lines)

Thanks Bob, very interesting!
 
Bjorn
http://www.bjornjensen.com
 
 
> >Bob wrote:
 
> That sent me back to the remote paper archives to dig out the reference.
> Just as well. The statement above is correct to 132', not 198'. The
> 198' figure distinguishes classes A and B. Translated: for recreational
> divers who don't venture below 132', it don't make no different nohow is
> the idea.
>
> Here are some details from "We Play the Regulator Testing Game", in IN
> DEPTH (Sept 1991) Vol 6, No. 9, pp. 6-12. (In the 12-page Issue :-).
>
> In May 1988, In Depth took a hard look at the U.S. Navy Experimental
> Diving Unit's <NEDU's> 1987 report on scuba regulator performance.
>
> The best regulators (Group A) meet the work-of-breathing standard
> down to 198' while maintaining a moderately heavy workload. Group B
> regulators met the work-or-breathing standard while maintaining a
> moderately heavy workload down to at least 132' but not to 198'
> (some Group B regulators did make it to the next depth increment of
> 165' however). Group C regulators did not meet the work-of-breathing
> standards at 132', but did meet the military breathing resistance
> standard.
>
> Group D regulators failed to meet the military standards. Group E
> regulators had such weird inhalation patterns that they boggled the
> test equipment.
>
> Report Card: Of the 51 regulators tested, 43 made it at least to
> Group C. 17 made it into Group B, and 8 made it into Group A.
>
> NEDU's classification categories have little to do with most
> recreational divers ...
>
> The indented paragraphs above are verbatim quotes from the IN DEPTH
> article.
>
> -- Bob.
>

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