Megayacht

A large vessel thats frequently a mansion on the water, that dispatches many smaller PWC's (personal watercraft)

They set up umbrellas on beach, dislike dogs, and make WAKE all day long in a calm anchorage, even if you were at location first.

Wow thats a big megayacht! Sure hope they don't make wake for the remaining hours of sunlight while trying to do sensitive electrical projects!