Operation Teardrop - Wikipedia
The Kaiser's U-boats
Meulan 85ft Gasoline-class Motor Torpedo Boat, INS Peres (T-207
Valentin: The German U-boat Pen That Survived Multiple 22,000
Permission to Come Aboard — Four Surviving WW2 U-Boats You Can
Lost Shipwreck Ironton Found by National Marine Researchers
File:UB 148 at sea 2.jpeg - Wikimedia Commons
How A Submarine Captain Became Known As A Man Who Almost Killed
U-505 – Chicago, Illinois - Atlas Obscura