Death in the Doldrums (Kindle)
U Cruisers Off West Africa
With their very long range, the giant Type IX U-Cruisers gave Admiral Dönitz's U-boat fleet global reach. Initially these boats operated with considerable success off the East coast of America and in the Caribbean but their main impact was in the Gulf of Guinea 1942-43 which, due to the closure of the Suez Canal, was a vital Allied supply route. Two submarines in particular (U-68 and U-505) had a profound effect causing major panic by their hugely successful operations.
10th April 1944
German submarine U-68 was a Type IXC U-boat of the German Kriegsmarine that operated during World War II. U-68 was one of the most successful boats, succeeding in sinking over 197,000 tons of allied shipping in 10 patrols, a career lasting more than three years. On the 10th April 1944 she was sunk by depth charges and rockets from Avenger and Wildcat aircraft of the US escort carrier Guadalcanal.