It seems odd that a ship that big would not have at least one set of auxiliary generators, located in another part of the ship, but then these vessels are built and manned to minimum standards, with cost a leading factor. I was surprised to learn, for example, that most of these diesel powered ships run their main propulsion engines on old fashioned "Bunker C" heavy, dirty, fuel oil, that hasn't been used by the Navy since the '70s. They operate with little margin for error.