What would happen if a bolt of lighting struck a boat in open water?

January 20, 2010 by homelighting · 9 Comments
Filed under: Boats & Boating 
lighting
Bitchy Girl asked:


What would happen to the people inside?
Does some device ground all boats therefore its never a problem?
If a boat didn’t have that protection from lighting what would happen to the boat itself? Would there be a big chunk taken out of it? Any and all crazy and ridiculous details of this questions much appreciated. full point for best anwer.

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Comments

9 Responses to “What would happen if a bolt of lighting struck a boat in open water?”
  1. Roni says:

    Poof………… [who] Roni

  2. Gabe says:

    White squall [who] Gabe

  3. Joe says:

    if it’s a metal boat, like a jon boat. REALLY bad deal. [who] Joe

  4. kay says:

    Depends on what kind of boat it is. Big ones have special stuff, yeah. Because they travel far. Like cruise ships, tankers, and cargo ships. Little ones….are smart enough not to go out into bad weather. ;-) [who] kay

  5. km9cm2e says:

    With 100 million volts, lightning can smash a hole through a hull, explode a mast and electrocute passengers in a single flash. [who] km9cm2e

  6. Baby says:

    it all depends where the lightening hit the boat . if the lightening hit metal and metal is wet it will than transfer to the wood and the boat would burn if lightening hit wood and no metal it my just chock you and no Metal nothing would happened [who] Baby

  7. jtexas says:

    it might just punch a hole in a fiberglass boat.

    a metal boat would come through a little better I think, because the boat itself would conduct the electricity to ground (or “earth” if you’re in the UK or Australia or whereever else they say “earth” instead of “ground”), which in this case is water.

    if you’re in, say, a pontoon boat with a wooden deck and an aluminum frame shelter, and the shelter frame is connected somehow to the metal pontoons, you might be deafened momentarily, but I don’t think you’d get a shock, long as you weren’t actually touching metal.

    your navionics would likely get fried. [who] jtexas

  8. Boatin' in VA! says:

    Having been thru a hellacious thunderstorm “once” let me tell you what happened to a 38′ cruiser that was in the same cove as we. This boat took a direct hit by a bolt. There was no visible damage to the vessel at all from the lightening (he was aground though as the 65 mph winds blew him ashore).

    As I was helping pull 11 other boats off the shoreline I noticed 6 members of the local fire dept. coming out of the woods and walking the shoreline. The went up to the 38 footer and I heard them ask the owner where the fire was on his vessel. He responded that there was no fire but that lightening had fried anyhting that was electrical on the boat and he wanted them to get him off the shoreline and then towed back in. Can you guess what the reaction was of the fire dept? You got it…they responded with “Are you nuts? If you have no fire and no injuries we’re out of here.” Needless to say they were not happy at all. How’d he get them there? Called 911 on his cell phone and stated his boat had been hit by lightening. :(

    This owner was lucky. Yes, he had to have everything that was electrical replaced but he had no structural damage or personal injury to anyone on the boat. The damage to a boat can be anything from what was described here to loss of the vessel and possible loss of life from lightening.

    The best thing anyone can do in a storm is throw out every inch of anchor line, put down your radio antenna, don’t touch anything that’s metal and get to the lowest portion of the ship and stay there until the storm passes. [who] Boatin’ in VA!

  9. No_Spam says:

    Bitchy,
    A lot to agree with in Boatin in VA. We lived aboard our 38′ sail boat on the East Coast and Bahamas, and saw plenty of lightning storms, and were usually aboard. We also experienced being hit with 1 water spout, and spent one hurricane aboard (the boat saw a total of 5 hurricanes).
    As we had a 38′ mast (lightning rod), and plenty of rigging, also conductive, we had a ground plate for our electronics and radio, our mast and rigging were grounded to the keel. I do not believe that we ever directly struck by lightning, but had several other cruisers with us that some of them were hit. The worst I saw was one mega yacht had all of their electronics fried, and boats on either side had some of theirs cooked also. Our plan was during an electrical storm, stay away from any metal that was directly attached to the mast.
    There is several devices that one can attach to the mast head to dissipate static electricity to attempt to avoid being struck, but this is used by generally less than 1/2 of the cruisers we were in touch with.
    Further, most all boats I refer to are fiberglass boats that are regularly lived aboard in marinas and crossing the oceans. [who] No_Spam

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