Like sticking the nose of one aircraft out of one end of the hangar and the tail out the other?
We used to have a travel pod that we hung all sorts of antenna's off of, put on rad and radar warning tags, and would hang it off the wing of one of our jets whenever we knew the Soviets were at the fenceline taking pictures.
So many of the important parts of a submarine are internal, all they really need to cover is the screws.