It is nice, but though others like the battleship, the carrier is always the largest ship in a fleet. Since the overlap is a problem, could the option be to shrink the others. Though it is good to see a better comparison between the destroyer and battleship, the galley is still quite large. Maybe the way to go would to make the larger ships single unit images and the smaller ones multiple as are displayed for land units. Say, 5 work boats for a unit, 4 trans ports, 3 galleons, 3 frigates - galleys - carvels, 2 destroyers, 1 battleship (smaller) and 1 carrier. Subs, since they don't distinuquish between disel and nuke, should be single and med large since often operate alone and can be sizable.