JSB im thinking of making the ship nuclear so no boiler!
...And that will solve all your problems
Heed advice given above for your ships to work.
1) When was she built?, this will determine hull shape (whether stealth or not for example)
2) The above point will also determine weapons and radar fit, which brings the next question, and that is the ships mission? What is your ship designed to do, if it is a shore bombardment or a sea control ship, or maybe ASW (Anti Submarine warfare)
3) See other ships from the era you have decided upon as when your ship is built. I mean real world ships, and this will give an indication what is required in terms of hull, engineering issues, weapon and radar fits.
4) $$$$$ Ships cost money, crew costs a lot of money and the infrastructure to support warships also costs money, so keep that in mind when designing your "the mother of all battleships".
5) Please, also note that a ship too long will have to be wide enough to keep its longitudinal strength, other wise a ship too long and narrow will be so much like a shoestring, with the same strength (comparatively speaking of course).
6) When all of the above was taken care off, then and only then you can start a drawing, which will no doubt be criticized here, but than "no pain, no gain".
7) Study real good what weapons do, and why or how, and where to place them. Your recent addition of Hedgehog, though correctly referred to as an anti submarine weapon, is horribly placed
it was designed as an ahead throwing weapon
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Thank you Kim for the crest
"Never fear to try on something new. Remember that the Titanic was built by professionals, and the Ark by an amateur"