Before I suggest guns or something like that, what's the ship's purpose? That may determine what logically goes on the deck.
By the way, if you want to have a studless approach, but don't have tiles, remember you can always turn studs sideways and use the sides of bricks as the surface area. They can be attached with technic bricks and pins, or modified bricks 1 x 4, with studs on the side. Just an option. Permalink