Join Date: Feb 2010
Location: Narragansett Bay
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Re: Anyone dive to clean their own bottom?
Stray current can be a problem. Some dock side divers are whacked every year. However, it's not very common either. If it's your own boat, why not just do it at anchor somewhere. Likely to be better water quality too. Check with your marina first. Ours doesn't permit dockside diving at all. It's a negotiated accommodation to the environmental agency that doesn't like excessive antifoulant heavy metals to be sloughed off in confined harbors.
Be sure to use the absolute softest media to scrub, or you're just removing too much antifoulant.
It can be an extremely exhausting process, where you'll quickly learn that paying a pro is worth every penny.
All but impossible to use only a snorkel. Scuba gear is most common (but get properly certified, as it can kill you). Hookah systems are usually used by the pros and some DIYers (still requires scuba training).
A cheat method (only works if all you have is slime) is to snorkel around the waterline and use a long handled, soft bristled brush to clean as far as you can reach. Dive only to do the remainder, which may only be the keel or bottom of rudder, depending on the size of your boat.
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In the harsh marine environment, something is always in need of repair. Margaritas fix everything.