LockMart Missile Ship / Arsenal Ship concepts :
Design a nice, expensive stealthy ship...and stick rectangular MLRS boxes on top. Genius!
Interesting if extreme design though.
No ship made of steel can be stealthy. It is HIGHLY reflective across all frequencies. Even if you coated it in RAM, SALT will make said surface reflective. So, automated washing machine that is stealthy would be required. Steel is required because if you DO have a problem you need to be able to weld under water.
PS. Not to OP but to someone upthread, Railgun is dropped because the EMP from firing said railgun makes it impossible to put an INS in it. Timed fuses are possible though.
PPS. Biggest threat is mines and missiles IMO. Solution mines: Hydrofoils a multitude of them. Solution Missiles: LASERS. Hundreds of them. Of course the biggest thing no one is talking about is EMP hardening which once again destroys LASER/RADAR, so we need massive advance in those areas before contemplating a Battleship. Besides the best solution to armor in a ship, is just a bazillion compartments. Nothing known can shed Mach 5 missiles. You might be able to shed M1 missiles... though lets not laugh too loudly all at the same time now unless there is a H-E-L-L of a lot of armor.