RE: How to become a Marine Electrician
I'm sure it varies from state to state, but here in Texas it's possible to become an electrician by working under the supervision of a master electrician for a certain number of hours then taking the state test to get your license.
You're on the right track, a knowledgeable marine electrician is assured of employment at a very good wage. I'd suggest getting one of Nigel Calder's books, "Boatowners Mechanical and Electrical Systems" comes to mind. I'd also contact ABYC and see what their certification track is. I'd also suggest contacting Professional Boatbuilder magazine and posing this question to them. I know they sponsor many training seminars and classes.
Much of the general electrical training won't be of much use to you as a marine elect. Marine stuff is heavy on electronics and, of course, DC. I'd try to bypass traditional training, maybe find a marine specific course and take that. Good luck to you and I'll assure you it will be worth your effort to pursue this.
Regards, Chuck. (Electrician for the University of Tx. Marine Science Institute.)