The last thing a submarine commander wants to see in his periscope is the sight of two enemy destroyers bearing down on his position, but that is exactly what Oberleutnant Fritz-Julius Lemp saw immediately after sinking the British freighter Fanad Head, Sept. 14, 1939. (See blog post “Fritz-Julius Lemp, Part 4,” July 1, 2016.)
Lemp ordered a crash dive to 80 meters, but the first salvo of depth charges rocked U-30, causing leaks and damaging many of the boat’s instruments. Seeking to escape the deadly explosions, he eventually took his boat down to 144 meters (470 feet), close to its operating limit. U-30’s hull creaked ominously under the pressure and was constantly buffeted by the falling depth charges, but the boat held together. During this extended ordeal Lemp’s quiet self-control calmed his crew and further burnished his reputation for coolness under pressure.
Following the nine-and-a-half hour pounding and with U-30’s batteries running low, Lemp slowly brought his boat to the surface at 11 p.m. The submarine was battered and leaking water, but he managed to slip away under cover of darkness.
He had hoped to set a course for his base in Wilhelmshaven, Germany, but soon discovered the boat’s guidance controls had been damaged. He also realized his badly wounded crewman needed serious medical attention, so Lemp navigated by radio beacon to Reykjavik, Iceland. The neutral port allowed him a limited stay, but it was enough time to stop most of the leaks and make running repairs to assure the boat could submerge in an emergency.
Lemp also arranged for Machinist Mate Adolf Schmidt to enter a local hospital. Before doing so, however, he had Schmidt sign a statement under oath that he would not reveal to anyone the events of Sept. 3, 1939, the day U-30 fatally torpedoed the British passenger ship Athenia.
The next day, Sept. 20, U-30 left Reykjavik to begin a week-long journey home, navigating by the stars. Along the way, the U-boat dived several times to avoid detection whenever a plane or ship was spotted on the horizon. A few days into the journey one of the boat’s two diesel engines quit working. On his final approach, Lemp refused the offer of a tow from a German minesweeper and his boat limped into Wilhelmshaven under its own power the morning of Sept. 27. Waiting for him at dockside was U-boat fleet commander Kommodore Karl Dӧnitz.
Lemp immediately told Dӧnitz he thought he sank Athenia. Accounts of the meeting ascribe various scathing remarks to the senior officer, but he likely suspected U-30’s involvement all along. Lemp explained the circumstances regarding the action and accepted that he had mistakenly identified the ship as an armed merchant cruiser. He also learned that for the past three weeks Germany had been denying responsibility for the attack because none of its ships reported any activity in the area where Athenia went down.
Dӧnitz ordered his young captain to go to Berlin and tell his story to the Naval High Command. As he boarded the plane the next day for the flight to Berlin, Lemp undoubtedly knew he faced a possible military trial for his actions. We will see the outcome in our next blog.