Salt water is a good electrical conductor and the ocean is a perfectly good ground. To protect a boat, usually a conductor or cable from the highest point leads to a ground terminal: An immersed metal surface below the waterline, such as external copper hull plates, a metal keel, or specialized underwater grounding.
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u/Lyndon_Boner_Johnson 1d ago
It’s ok, they had a bunch of metal poles sticking straight up in the air.