Quote Originally Posted by mackrackit View Post
How do you earth ground a boat?
run it up onto the beach...

Sorry, couldn't resist...

Seawater is conductive (depending on voltage) but also very corrosive...
i think their is a metal (possibly zinc) strip to the bottom of a boats keel...

As for using the anchor, you can't... corrosion on each individual chain loop will cause insulation...

The fun comes when you try to figure out how to earth a plane...