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Old 28-11-2014, 10:32   #91
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Re: Hit by lightning this afternoon in Botany Bay

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Originally Posted by colemj View Post
Wow! Threads always drift, but your post must have set a record! I have whiplash!

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I think he meant to be responding to another thread more so than drift?
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Old 28-11-2014, 10:39   #92
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Re: Hit by lightning this afternoon in Botany Bay

The Art and Science of Lightning Protection by Martin Uman is the most comprehensive book I know of on lightning. It does use higher math in places, but just skip that if you like.
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Old 29-11-2014, 05:24   #93
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Re: Hit by lightning this afternoon in Botany Bay

Hi all

The list gets bigger.
Discovered yesterday that my Icom MF/HF radio is toast along with the auto antenna tuner, Ctek 12v to 12V charger and solar panel.
There will be more - no doubt.

All investigation so far is leading to the realisation that all circuits that utilised a switch before the "appliance" eg things operated from a switch panel, were saved but those that did not, radios, GPS, Autopilot etc that have an integral switch at the unit were damaged. Food for thought.

I exclude LED lighting from the above statement. It all fried switched or not.

Getting the rigger who replaced all my standing rigging last November, to go aloft on Tuesday to check things out. Usual Slipway is busy so i am waiting for a window to slip her and check things out under the waterline.

Will keep you posted.

Thanks for the comments and well wishes.

Steve
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Old 29-11-2014, 05:37   #94
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Re: Hit by lightning this afternoon in Botany Bay

keep an eye on your mirrors in the heads, too. You might notice them turning black over the next year or two.

Like Mark, I've gotten real interested in this lightning stuff. Within six months after getting hit on the boat, our house was also hit. With us sitting right below where the bolt hit. I had a bleeding cut on the side of my (shaved) head from a chip of concrete that exploded as the lightning that hit the house went from the jacket of a VHF antenna cable, through the concrete block wall as it jumped from the cable into the steel rebar that was inside solid concrete. Think about that one for a second. The lightning went through several inches of concrete into a vertical wall, which is part of the shortest path to a cistern.

Among the things I've read are that catamarans are several times more likely to be hit than monohulls. More likely in shallow water. And that there are very, very few instances of people being injured by lightning strikes on sailboats. The standing rigging does act as a faraday cage, and there is a zone of comparable safety inside the rigging triangle.
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Old 29-11-2014, 13:00   #95
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Re: Hit by lightning this afternoon in Botany Bay

Sweet Chariot, Steve,

Glad to hear you're coming along, there, sorry about all the damage, but some was inevitable. What an aggro!

Good luck with it all.

Ann
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Old 29-11-2014, 15:07   #96
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Re: Hit by lightning this afternoon in Botany Bay

Canibul quote "Among the things I've read are that catamarans are several times more likely to be hit than monohulls. More likely in shallow water. And that there are very, very few instances of people being injured by lightning strikes on sailboats. The standing rigging does act as a faraday cage, and there is a zone of comparable safety inside the rigging triangle."

That odd, would never have thought the ones with the shortest masts........

Must be due to the large area of charged salt water electrolyte between the hull.
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Old 29-11-2014, 15:16   #97
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Re: Hit by lightning this afternoon in Botany Bay

Sweet Chariot. Sincere sympathies. Great info you're giving. Best of luck with all the recovery.
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Old 29-11-2014, 15:19   #98
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Re: Hit by lightning this afternoon in Botany Bay

It's all a crap shoot.

With the no. of variables I don't think anyone knows?
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Old 02-12-2014, 23:42   #99
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Re: Hit by lightning this afternoon in Botany Bay

Did you know that from the people that are hit by a lightning only 10% die? did you know that chances of being hit by a lightning are of 1 in 1900000
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Old 02-12-2014, 23:43   #100
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Re: Hit by lightning this afternoon in Botany Bay

Thanks God you are okay!All the damaged stuff can be prepared! how lucky!
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Old 03-12-2014, 05:38   #101
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Re: Hit by lightning this afternoon in Botany Bay

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Did you know that chances of being hit by a lightning are of 1 in 1900000
That is better than the odds of winning the Florida lottery.
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Old 03-12-2014, 06:18   #102
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Re: Hit by lightning this afternoon in Botany Bay

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Originally Posted by BoatShowAvenue View Post
Did you know that from the people that are hit by a lightning only 10% die? did you know that chances of being hit by a lightning are of 1 in 1900000
Those are the odds of a person being bodily struck by lightning, not a strike on a boat. They also are averaged odds for the entire US, not specific areas and not worldwide.

In certain parts of the world, the odds approach 25-50% of your boat being struck in a given year (personal records), while in other parts of the world the odds are essentially nil.

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Old 03-12-2014, 06:26   #103
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Re: Hit by lightning this afternoon in Botany Bay

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Originally Posted by colemj View Post
In certain parts of the world, the odds approach 25-50% of your boat being struck in a given year (personal records), while in other parts of the world the odds are essentially nil.

Mark
Where might the odds reach 25-50% in a year? That seems extremely high. I have heard Florida referred to as the lightening capital of the world (probably a bit of an exaggeration but still a pretty good indication of the strike frequency here) and I don't see anything like that frequency here.

Wherever that may be I think I want to avoid the neighborhood.
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Old 03-12-2014, 06:41   #104
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Re: Hit by lightning this afternoon in Botany Bay

According to NOAA:

Odds of being struck by lightning in a given year (reported deaths + injuries) 1/1,000,000
Odds of being struck by lightning in a given year (estimated deaths + injuries) 1/775,000
Odds of being struck in your lifetime (Est. 80 years) 1/10,000

NWS JetStream - Lightning Frequently Asked Questions

Lowering The Lightning Odds - Seaworthy Magazine - BoatUS

According to the most recent (2000-2005) BoatUS Marine Insurance claim files, the odds of your boat being struck by lightning in any year are about 1.2 in 1000. In fact, the claim files show no lightning claims for 13 states such as Idaho and Nebraska (no surprise). But, for those of you with boats in Florida, nobody has to tell you the odds are greater — much greater. Thirty-three percent of all lightning claims are from the Sunshine State and the strike rate there is 3.3 boats per thousand.

Your Boat's Been Hit By Lightning - Now What? - Seaworthy - BoatUS
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Old 03-12-2014, 06:47   #105
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Re: Hit by lightning this afternoon in Botany Bay

Floridians think they have lived in the lightning capital of the world until they hit parts of Central America…

Two summers ago in the San Blas Panama, I recorded 50% of the boats there were damaged by lightning. Most years it is about 25%. Just two weeks ago in a single anchorage, 5 of 10 boats suffered lightning damage from a single squall (I don't know how many total boats were in the cruising area total, but estimate it was ~30). In September, 4 boats were struck in Shelter Bay Marina, Panama.

All of this could be even higher, as the above only represents what I witnessed in the specific area I was in.

Mark
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