When you look at pictures of the Arizona (and those of her class) you see the two tripod masts, on top of each is a large three-story structure. I know they're called "fighting tops" but I've never read exactly what went on up there. These are large structures, much larger than was needed for look outs or even observing shell splashes. They couldn't have been well armored since the weight would have made the ship exceedingly top heavy. So, what functions were performed up there and how many men manned these things?