Our group has 2 ships: the Red Wake (Grim Reaper figurehead, black flag with shark emblem), and the Wasp (yellow and black paint, wasp figurehead, black flag with yellow wasp skull and bones that emulate Calostrias symbol).
I don't think all classes should be perfectly balanced.
I agree with this in theory. An individual that has practiced to master weaponry all his life (fighter) simply will not bring the same amount of options or reality-shattering damage potential as someone who has studied the arcane arts (wizard). In practice this can lead to resentment between the players (or at least this has been my experience, YMMV). Class balance is a tricky business.