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Whoops..I sent this message yesterday, but it didn't go to Techdiver..

>Hi Folks
>        Thanks to all that have answered my original query, I have picked up
>a couple of very good (maby life saving) tips.
>        Nobody has yet taken a crack at the second half of my question.. If
>these technics, as described by several people, are being used. Why are we
>still hearing about deaths caused by this problem.

Because of tremendous task loading which can easily overwhelm a diver and
contribute to fatal errors. Also possibly narcosis can be a contributing factor
in some cases, as can other medical conditions (unkown factors) that might not
be found until an autopsy is performed (or never known).  There are simply to
many factors to be able to make any simple universal blanket statements or
completely safe proceedures.

Mark.

"People have a natural tendency to take more risk when they percieve themselves
to be safer, thus offsetting to some extent-and possibly completely-the benefit
they might get from the equipment. ...-.... When you add any risk-reducing
device, you must maintain your former level of caution in order to get the full
benefit."-U of Illinois @ Urbana/Champaign professor R. Chirinko

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