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 Question: Handling a C25 in a thunderstorm		  New Topic  Topic Locked
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Brooke Willson
Admiral

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USA
983 Posts
Response Posted - 05/27/2004 :  14:24:39  Show Profile
Speaking as professional on the subject (and I don't mean golf), I am convinced God absolutely adores challenges, because he created about six billion of us.

Brooke
Edited by - Brooke Willson on 05/27/2004 14:26:08
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Jonathan Cuff
Navigator

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Cayman Island
173 Posts
Response Posted - 05/27/2004 :  17:17:40  Show Profile
I don't think he created all of us..........!
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Brooke Willson
Admiral

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USA
983 Posts
Response Posted - 05/27/2004 :  22:22:26  Show Profile
I am sure of it. It's just that some folks don't realize it, and some others think they were but people who don't agree with them weren't. You know. . . powerboaters, Yankee fans, Virginia Tech grads. . . .

Brooke
Edited by - Brooke Willson on 05/27/2004 22:24:42
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Dave Bristle
Master Marine Consultant

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Djibouti
10005 Posts
Response Posted - 05/27/2004 :  23:15:03  Show Profile
There are too many variables for a definitive answer--for example:

- Salt water conducts much better than fresh, which means that lightning is more likely to hit saltwater directly and somewhat less likely to hit the boat. Statistics clearly support this theory.

- I don't see the rode increasing the attraction unless it's all chain and you're in fresh water.

- The aluminum mast is a pretty good conductor, but the stainless stays are nowhere near as good. Therefore, the idea (mentioned here some time ago) of clipping jumper cables to the stays and dropping other end of the cables in the water is dubious.

- That conductive mast is sitting on top of a cabin, with almost 6' of dry air, dry wood, and some insulating fiberglass between it and the water. That makes a direct path to the water through wet air outside of the boat likely the more attractive one. I know people who have had strikes into the water within yards of their sailboats. A grounded rig could change that for the worse.

- Much of the damage to boats' electronics in lightning storms is from the pulse through the water from nearby strikes.

- The pros say the ground should not be to the keel--the stainless bolts are not good conductors, nor is any fiberglass encasing. Instead, it should connect to a square-foot-or-larger copper plate on the hull below the waterline. A system done wrong could just make things worse--adding to the attraction but causing damage when it happens.

Your mileage may vary.
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Sea Trac
Master Marine Consultant

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Vanuatu
1357 Posts
Response Posted - 05/27/2004 :  23:49:32  Show Profile
<blockquote id="quote"><font size="1" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by Dave Bristle</i>
<br />...dry wood<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">
Speak for yourself...
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Jared
1st Mate

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USA
70 Posts
Response Posted - 05/28/2004 :  08:20:53  Show Profile  Visit Jared's Homepage
Hey now, easy on us poor Tech folks...
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TomA
1st Mate

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USA
91 Posts
Response Posted - 05/28/2004 :  11:55:21  Show Profile
Thanks for all of the advice! Heading to the marina sounds like the best option for a day sail. However, if we're out for several days and lightning starts popping it sounds like "ya pays your money and takes ya chances!"

Tom
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Notice: The advice given on this site is based upon individual or quoted experience, yours may differ.
The Officers, Staff and members of this site only provide information based upon the concept that anyone utilizing this information does so at their own risk and holds harmless all contributors to this site.