Easy Ships can be played either, by choosing a historic scenario, which lists an era and a set of ships participating in a particular conflict or look up the type, class/name, guns, movement, amour, defense, and point specifications for each ship you intend to commit to the engagement on the supplied HTML's. There is a pages for each nation. Ship types are listed on the top of the page and specifications for each ship type are listed below.
Using a historic scenario will make the skirmish seem more realistic, but if you are like me you may not have too many of these naval miniatures and will have to make do with what you have. I have the following 1/4800 miniatures:
Whether these fleets are balanced in the way of capabilities or not I do not know, but with the throw of the dice, you always have that element of chance.