The problem with the paper label in this post (And the game's use of them) is there is a wild difference between three sets of paper used.
General Plans - This is the exact plans the shipyards would follow and try to achieve, deviating only when needed.
Design proposals - these are basic 'designs' and are just a general idea of x armament, x expected machinery, x profile, and x armor. A shipyard could not build from these as they may not even be feasible with current construction techniques and/or machinery.
Requirements listing - This isn't a design even it's simply a listing of what a navy wanted from a ship and would be given to a design board to try to achieve. The few ships in the game made from these are essentially fictional.