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smittypaddler



Joined: 30 Jun 2004
Posts: 337
City/Region: Neenah, Wisconsin
State or Province: WI
C-Dory Year: 2004
C-Dory Model: 22 Cruiser
Vessel Name: Na Waqa
PostPosted: Sun Aug 02, 2015 11:03 pm    Post subject: A jumper cable to a metal shroud? Reply with quote

I used to have a Corinthian Sailstar (which I miss). I kept an automobile jumper cable in the boat, and when anchored, clipped one end to a metal shroud, and tossed the other end in the water. I never got struck by lightning, but I'll never know whether it was the jumper cable that saved me. I've never done anything on my C-Dory except lower the VHF antenna. I do toss a sacrificial zinc over the side with an alligator clip to the metal on the engines when I'm in a marina, but that's for electrolysis, not lightning protection.
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garyf



Joined: 01 Sep 2015
Posts: 167
City/Region: Lincoln
State or Province: CA
C-Dory Year: 1991
C-Dory Model: 22 Cruiser
Vessel Name: C-Story
Photos: C-Story
PostPosted: Tue Sep 08, 2015 1:33 am    Post subject: Reply with quote

localboy wrote:
So what would happen if the hand held were NOT in a steel ammo box? Say, just lying on a shelf on the boat or in the V-berth?


It depends on how close of a strike you get. Even if you don't take a direct hit, lightning can damage electronics through an electromagnetic pulse (EMP) effect. So... if your equipment is not protected and lightning is nearby, there's always the potential for damage. A hand-held radio and hand-held GPS in a metal box is not a bad idea.
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hardee



Joined: 30 Oct 2006
Posts: 12632
City/Region: Sequim
State or Province: WA
C-Dory Year: 2005
C-Dory Model: 22 Cruiser
Vessel Name: Sleepy-C
Photos: SleepyC
PostPosted: Tue Sep 08, 2015 3:54 am    Post subject: Reply with quote

I like the idea of a handheld VHF and GPS in a metal box for lightening protection. I'm not sure I like the idea of a metal box on board. I really work at keeping magnetic or steel anything off the boat. Just trying to keep it away from the AP direction sensor and the KVH compass.

Harvey
SleepyC Moon


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Though in our sleep we are not conscious of our activity or surroundings, we should not, in our wakefulness, be unconscious of our sleep.
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