[Paddlewise] Lightining

From: Michael Edelman <mje_at_spamcop.net>
Date: Mon, 26 Mar 2001 17:54:50 -0500
Christine wrote:

1.  To my knowledge nobody has ever been killed, or seriously injured
by
lightning while in a fiberglass (read insulating) vessel.

I'm not sure about that. For one thing, an insulator is only an
insulatyor up to its breakdown voltage- which, for a fiberglass hull is
a fraction of the potential of a lightining strike. Even before the
strike the glass does you no good- you're sitting on one plate of a huge
capacitor while a charge builds up around you.

Metal boats, like metal aircraft,  are actually much safer than glass
boats. The charge is conducted around the occupants in a metal cage. See
http://www.cdc.gov/niosh/nasd/docs/as04800.html for an authoritative
answer.

2.  It is most unlikely that lightning would strike a kayak since it is
low
and has nothing like a mast or antenna to attract a strike.

Masts don't "attract" strikes. What causes a strike in one location over
another is a difference in charge. A mast can *protect* a boat.

3.  If you turn over I doubt if the stray electric currents in the water

would harm you. In fact if the water was reasonably warm and if I was
sure I
could re-enter my boat  I would get in the water. I know a person who
blew
over in a day sailor during an intense L.I. Sound thunderstorm.  He
reported
several water strikes in his vicinity but only "tingling" sensation from
the
salt water carried electric surge.

Of course it depends on how close the strikes are. And you're safer 10
or 20 feet below the surface ;-)

-- mike
 -------------------------
 Michael Edelman
 mje_at_spamcop.net
 http://www.foldingkayaks.org
 http://www.findascope.com



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Received on Mon Mar 26 2001 - 15:59:43 PST

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