Operational level wargame for the battle of the Atlantic between 1939 to 1942. Standard game is covering commerce raiding by the capital ships and Armed Merchant Cruisers. U-boat and aircraft can add by using optional rules. Players control either Kriegsmarine(German Navy) or Allied Navy. The main part of the game is search and pursuit of opponent ships with dual maps and secret units deployment. The purpose of German player is sinking of Allied convoy. The purpose of Allied player is escort of convoy, and also sinking of the German warships.