9. The German Technology Awaiting the Japanese Golden Submarine

Awaiting the I-52 in Lorient, to carry back home to Japan, were about 40 tons of advanced Nazi technology, plus assorted secret documents, drawings, and schematics. The cargo for the return voyage included German radar equipment, vacuum tubes, optical glass, bombsights, chemicals, a Jumo 213-A engine used in the FW-190D fighter, and T5 acoustic torpedoes that could home in on the sound of ship propellers.



