What are often called "railings" on the No.1 deck of a major ship are in fact stanchions and cables that are struck when the ship is going to fire it's guns.
In the case of the stern catapult, it should be hunkered down on the deck and since the "railings" are up, squared away fore and aft.
I would also say that you should get rid of those horrible girder stand things.
Putting the ship flat on the base would be an improvement.
Another possibility at this point, and easy to do, is the so called "dry dock" display.
It is in no way even close to accurate, but it looks pretty good. Get a bunch of 1/4" x 1/4" strips of wood and cut them all to length slightly shorter than the width of your base. Glue them down 1/4" apart using extra pieces as spacers.
Glue the ship on those.