This motorboat was a floating bomb. 3 gasoline outboards(the big one must suck gas by the tub full); taking no chances on being stranded?
The AC on top and that massive transmitter-reciever gizmo, TV(?) below, were all powered by a Honda generator.
There is almost no energy storage for this boat-it's a floating power generator.
When I see boats like this, I like to think there's an ill person aboard that needs the stuff for medical reasons, hence the closed up hatches and doors. Or, this could be a space ship from another planet and the inhabitants can't survive in the Maine atmosphere?