Since we keep track of how many crewmen are assigned to the various tasks about the ship individually, and since those tasks have physical locations represented on the ships, shots to different parts of the ship will injure crewmen assigned to different tasks. And because we keep track of the number of men assigned to each battery on your ship, a broadside of langridge may stun the gun-crews on your exposed topdeck, but your gundeck batteries will be unaffected.