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Thunder ang lightning

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Post Options Post Options   Quote Oinks Quote  Post ReplyReply Direct Link To This Post Topic: Thunder ang lightning
    Posted: 13 Jun 16 at 3:00pm
A guy at our club was struck by lightning a good few years ago now whilst sailing his Laser. The way I heard it, the lightning first struck an electricity pylon and routed from there to his mast. It blew a hole in the bottom of his boat and chunks of gelcoat along with various fittings flew off the boat. I think he suffered burns to his hands (probably from the tiller),and his hearing was badly affected for a few weeks but he was otherwise ok.
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Post Options Post Options   Quote iGRF Quote  Post ReplyReply Direct Link To This Post Posted: 13 Jun 16 at 4:04pm
Originally posted by Time Lord

" wet suit acted like a Faradays cage (look it up it's what happens in cars and airplanes). I think there would be less contact in a dinghy since we're not holding onto the boom as we do windsurfing."

Doubt that your wetsuit would act as a Faraday cage as this has to be metal and conduct electricity. More likely the neoprene acted as an insulator and protected you in that way.

Not sure whether the shrouds, mast and boom on a conventional dinghy would act as a Faraday but certainly possible. A few years ago I did a web search for reports of dinghy sailors being hit by lightning but could find no reports. By the way, carbon fibre conducts electricity almost as well as aluminium.




In as much as it was wet all over and I watchet the blue flashes as they crackled up my arms then down my legs.
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Post Options Post Options   Quote blueboy Quote  Post ReplyReply Direct Link To This Post Posted: 13 Jun 16 at 5:59pm
Years ago we were out as a thunderstorm rolled down Lake Bala. It was very obviously coming our way. We retired but the race continued. One boat was hit and iirc a hole was punched in their hull. The crew was left with a tale to tell but unhurt. I thought then and I think now that the race ought to have been abandoned.
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Post Options Post Options   Quote 423zero Quote  Post ReplyReply Direct Link To This Post Posted: 13 Jun 16 at 8:03pm
I think we need a Boffin to pass judgement on this one  Exclamation

Anecdotes are all well and good, but not with millions of volts of electricity, this level of power makes it's own path to ground, preferably not through sailing kid's.

Their is a video on youtube of a dinghy being struck by lightning.
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Post Options Post Options   Quote Rupert Quote  Post ReplyReply Direct Link To This Post Posted: 13 Jun 16 at 9:14pm
If I'm running a session, it is straight off the water, if necessary getting the kids onto a powerboat and capsizing the dinghies, if it is really close. Not done that, but have stopped sessions.
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Post Options Post Options   Quote piglet Quote  Post ReplyReply Direct Link To This Post Posted: 13 Jun 16 at 10:37pm
Leaving training sessions aside, shouldn't race participation be a matter of RRS4, ie. the sailor himself makes his own risk assessment thus removing those decisions from the RO, who is usually an unpaid volunteer.
We all make our own decision to race in any given wind strength/sea state, lightning is just weather and we all understand weather.
However if I were RO I may abandon if I was concerned for the wellbeing of my fellow volunteers on the water providing rescue cover.
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Post Options Post Options   Quote blueboy Quote  Post ReplyReply Direct Link To This Post Posted: 14 Jun 16 at 7:28am
Originally posted by piglet

Leaving training sessions aside, shouldn't race participation be a matter of RRS4


No. Those days are long gone. See the 24 hour postponement of a Fastnet start for the definitive nail in the RRS4 coffin.

At my club if acting as RO I have to fill in and file cheerful risk assessment forms before I can hoist any class flags and I imagine most clubs are the same. If they are not they need to join the 21st century.


Edited by blueboy - 14 Jun 16 at 7:31am
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Post Options Post Options   Quote Paramedic Quote  Post ReplyReply Direct Link To This Post Posted: 14 Jun 16 at 8:13am
Originally posted by blueboy

[QUOTE=piglet]
At my club if acting as RO I have to fill in and file cheerful risk assessment forms before I can hoist any class flags and I imagine most clubs are the same. If they are not they need to join the 21st century.

At the risk of taking this off on a tangent none of the 5 clubs i'm associated with do. Theres tick boxes on the recording sheet for safety cover and weather but no risk assessment - i suspect most members would refuse or be reluctant to do duties under those conditions, and thats what RRS4 is there for.
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Post Options Post Options   Quote Rupert Quote  Post ReplyReply Direct Link To This Post Posted: 14 Jun 16 at 8:28am
I'd expect the person in charge to be aware of what was happening, and effectively be carrying out real time risk assessments, even if they call it common sense, but not to be form filling beforehand, that should have been done by the club to form the basis of SOPs. I'd expect any incident to be reported, though.
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Post Options Post Options   Quote davidyacht Quote  Post ReplyReply Direct Link To This Post Posted: 14 Jun 16 at 8:53am
Does a dinghies rigging work as a Faraday Cage?  In a yacht one could have a grounding system in heavy duty cable from the top of the mast to the keel or a grounding plate.  Again in yachts the thing that most experts can agree on is don't have the highest mast in the harbour!
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