I understand the science, same. I am the asshole who joins a spreadable-scifi space opera game then makes RKKVs and shit to ruin everyone's fun. Peppermint and Soboerd, my recommendation would be to not try and criticize others and tell them to be smart, but just to play smart and use things the way science says they should be, then balance around that. That is the best way to use science, in low-realism games. One of my favourite things to do is to play in space opera nation RPs and play some shitty underdog single-planet hoot civilization, then fight as equals with massive empires due to science.

As a side note, the shore battery to naval gun ratio is in effect before defenses are taken into account - it is simply a statement of accuracy, not of durability, and that number comes from before the 2nd world war, I am almost certain.

Side Side note, limbered anti-aircraft guns are very feasible and I am positing that my Nation at least has a piece of semi-mobile artillery that is capable of hitting Elan-powered ships