Captain Sam is an experienced convoy commander and Captain of a Mahan Class destroyer. He is responsible for thousands of men in warships and the merchant ships of this convoy that must get to England for that country to survive. The Germans have proved the master of the Atlantic in this war. This battle of the Atlantic. German submarines have sunk thousands of ships. Those ships carried desperately needed things for England everything from food, medicines, and clothing. And naturally things to make war. Things needed to invade France and end the terror the Germans created all over Europe. This is the time of the war when the Allies finally have enough ships and aircraft to counter the Germans in Atlantic. The Germans are still very formidable. The Germans are desperate to stop supplies from reaching England, otherwise they know it will get mush worse for them.