Yep, all done without laser cutting precision on metal plates and CAD.
you know, sometimes I wonder if it wasn't actually easier to do it without so many options available today
from what I figured, they (Navies and their Battleship Designers) in the first place decided about
- the displacement: it basically determined the dimensions (to fit into existing facilities: docks for building; Panama, Suez canals for passage), and the cost;
- and the main armament: it determined the layout (of the propulsion mainly);
and then the remaining parameters (protection, speed, range, ...) were set (and some of them sacrificed)
of course, all this was very complex, as I found out when preparing posts for
The Viribus Unitis Battleship: 1:25 Model; Main Gun Turrets
thread LOL