Documentation in SoftSide Magazine Proceed at once to escort convoy vessels across the sea from Westside to Eastside. Enemy submarines lying in the area. It is essential that at least three get through. Objective The Submarine Commander wins if the number of convoy vessels remaining plus the number that have crossed the sea successfully is less than 3 (or any number up to 6 depending on the difficulty level). The Fleet Commander wins if all submarines are destroyed or at least 3 convoy vessels cross the sea. Vessels The Fleet Commander has 6 destroyers and 6 convoy vessels. The Submarine Commander has 10 submarines.