2nd Dog Watch, I have the same issue at our
dock but am out for the
winter. I am 95% sure my neighbor is dumping DC into the
water (and he said it's quite possible). So here is how I am handling it. While we are out I'm going through my DC and AC systems looking for any faults. I'm about half done with nothing showing up yet. Our marina has a known crappy ground as well so I'm also installing an isolation transformer since I have an
aluminum saildrive that could easily become an expensive anode. Not to mention 90% of the boats use an improper anode material (zinc) for our fresh
water location which should be magnesium or
aluminum. In the Spring I'm going to help my neighbor go through his boat looking for problems. I have found folks more receptive to offers of help than threats.
Now if said neighbor were an ass I'd get everyone within 50 feet of him to write a letter to the management, split the cost for a
marine electrician to document the issue and then if the neighbor was still dug in with denial I'd consult an attorney. I'd hope he'd cave to a
mob of angry neighbors. I'm not one to consider
legal action if I can any other means to solve the issue. Remember the burden is on you to prove your case in a court of law. You have done some preliminary
work but need a subject matter expert to present facts. All of this is likely more expensive than fixing the problem.
I wonder if there is a public
service area that could document a
safety problem.
Honestly though I think to win you'd need to prove yourself innocent and that specific boat guilty and in a marina might be tough. This would be small claims too where you don't need an attorney necessarily. I'm not in the
legal field nor do I play one on TV but these are my thoughts. I wish you the best of luck getting this resolved quickly and amicably. SC