Long story short i lost my 52 Irwin and 150K from a Hurricane and a Power surge. Walter took a hit on Firewater and had to replace his shore power and AC panel. My little boat took a hit and all my AC panel lights went out. I just purchased a surge protector/GF sensor for 30 amp service for $190
The marinas have no surge protection and are grandfathered in to current specs. Protect your boat!!
If you don't know about surge protection and ground fault protection just ask me. I am Schneider Electric for 2 months. Then I get expensive.