There have been several stories in the news lately about swimmers getting killed by Electrical Shock Drowning (ESD) when swimming near docs in Marinas. The diagram at the following link shows how it happens, but I'm not understanding why electrical service to the docs isn't Ground Fault Circuit Interrupter (GFCI) protected? That's what GFCI breakers are for! http://www.electricshockdrowning.org/esd--faq.html Is there some fundamental reason that they can't be used? Are ground faults so common on Marinas tht there would be too many nuisance blows?