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Date: Sat, 23 Mar 1996 21:27:57 -0500
From: Anthony DeBoer <adb@he*.re*.or*>
To: techdiver@terra.net
Subject: Re: One More diver dead
Organization: Linda's Dragon Memorial Society
Anthony Montgomery <amontgom@ha*.ed*> wrote:
> ... Now, I'm not sure, but I don't remember about hearing of this 
>many separate deaths so close together locally.  ...

By their very nature, random events don't occur at regular intervals.  A
few years ago, we had three unrelated diver deaths the same summer in
Kingston, Ontario, despite having none at all in the area most years.  A
lot of people really got their britches in a knot, the inquests got a lot
of publicity, and the media followed its usual standards.  One wreck got
a "killer" reputation because two of the fatalities happened there,
despite being no different from a safety viewpoint than the dozen nearest
other wrecks.

It's certainly necessary to examine the facts and determine that the
accidents were in fact unrelated (if for example all of the victims had
gotten their tanks filled the same day from the same compressor, I'd want
to see an air test), but that's something that has to be done by quiet
investigation and not by the media.

This sort of thing happens in other fields too.  A particular aircraft
type will get a "killer" reputation because of a statistical knot and a
sudden group of accidents (witness recent US Navy experience with the
F-14).  Let's hope recent events in Hawaii aren't repeated and that the
people who assume that all statistical anomalies must be significant go
back to their horoscopes.

-- 
Anthony DeBoer                                  http://www.onramp.ca/~adb/
adb@he*.re*.or* (here)
adb@ge*.co* (work)                             #include "std.disclaimer"

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