After 38 years in the navy I can tell you this. As you close your target, all is revealed. Ship class, ship name, armament, radars (okay we can skip that one), speed, etc. Difficulty in ID at long range is a great idea, but if you want to stick with your realism model, before you engage you should know most of the details. Having said that, sometimes closing to get the details is suicide.....that's a shame...