There are 79 classes of battleship, battle cruiser, heavy and light cruisers, destroyers, and transports included with an additional 3 classes of old battleships, armored cruisers and torpedo boats included for WWI. The player commands up to 20 ships at a time for either side. During combat the computer keeps track of every single shell hit and calculates damage based on various factors. The game allows the player to modify ship data, create maps, ships, or scenarios.