A cannonball strikes. You go downstairs and slap a bit of wood on the hole and you're good to go.
But what about if some cannonball strikes have a chance to inflict damage to the OUTSIDE of the hull. Maybe a certain sweet spot? Maybe a random chance, 10% chance?
External damage doesn't cause your boat to leak water, but maybe it has other effects?
Listing to one side? Reduced top speed? Reduced manoeuvrability aka a damaged rudder anyone?
External damage can only be repaired when the ship is at a stand still, or through some very skilled use of a harpoon rowboat!
