Enigma U-Boats. Breaking the Code. The True Story

book summary

Enigma-The Impenetrable Puzzle. The German Radio System. The First Naval Enigma Wheels-The Sinking of U33. Weather Ships for Bletchley Park. U-boats at Sea. The Secret Capture: U110-The Victim; Lemp's State of Mind; The Convoy System in Early 1941; Convoy OB318; The Day of the Capture. The Surrender of U570. Shark-The Four-wheel Enigma Code: Boarding U559; The Dive. Stranded in Africa. The Capture of U505. Other Secret Captures?: Secrets from U49; The Bizarre End of U501; The Loss of U175; The Prolonged Hunt for U744. The Sinking and Raising of U250. Salvaging Secrets. U1024-The Last Capture...