Helo pad was added during one of the periodic post-war refits.
A volley of 16" shells is pretty impressive, and cheaper than a Tomahawk too.
As for railguns...I'll be suitably impressed when they deploy them. There are lots of things that have been planned and "almost ready" for years now. Personally I'm looking forward to the Metalstorm, for when things need to be way-beyond-dead right now.
