well gunboat in terms of wrld war two is a PT boat(which had like 15 guys and was all wood) to mabye something the size of a corvette modetrn patrol boats(at least in australia) have around 20 people(armidale class)i base my gunboat off that you also gotta remember these ships look considerably larger then there "water navy" counterparts and yes tech helps you still need alotta crew for mantince and such(besides sure i rely on alotta tech(the ship has an AI like in halo)but i still use alotta crew)
![[Image: 2emctxg.png]](http://i55.tinypic.com/2emctxg.png)