Why did Germany lose the battle of Atlantic?

Captain Frederic (Frederick in some sources) John Walker, known of course as Johnnie Walker. This man developed a series of tactics for escort vessels to use while protecting convoys that greatly increased their effectiveness in “persuading” U-boat captains to break off attacks, and in killing U-boats. read more

In February the Allies lost 359,276 tons in the North Atlantic; still with 18 U-boats lost, Dönitz could not have been happy. In March sinkings by U-boats reached 627,377 tons, but within two months Allied escorts and air cover reversed the battle. The Germans lost 41 boats in May while sinking only 264,852 tons of shipping in the North Atlantic. read more

Germany lost the Battle of the Atlantic because: Convoys, protected by destroyers and other ships, were utilized. At night and in fog, the convoys were difficult or impossible to see. Radar continually improved and in the end could spot submarine conning towers 40 miles away, at night. Sonar also improved. read more