There would be numerous types. ST:P saved on CGI money with what they did. Though there are legitimate arguments on size of platform. Since we know an 1,800 ton air independent propulsion coastal sub can sink a 100,000 ton carrier as can a much smaller 20-30 ton fighter, there is concern about building huge ships. Much of SciFi is enamored of the DREADNOUGHT! That name is so cool. And look at all those BIG GUNS. And then it gets taken out by a quiet 2000 ton sub or a 24 ton fighter. It's a balanced debate.