During the Cold War, the Soviet Union built Project 661, a revolutionary titanium submarine designed to hunt American aircraft carriers. Known as the Golden Fish, this nuclear-powered vessel achieved an unprecedented submerged speed of 44.7 knots. However, the extreme velocity generated severe acoustic cavitation, blinding the submarine’s own sonar systems and broadcasting its position across the ocean. Explore the engineering history and fatal flaws of the fastest submarine ever constructed.

Source: The Soviet Submarine So Fast It Boiled the Ocean… And the Reason the USSR Erased It