What is the fastest submarine?

Answer by  Jimbob (2275)

The Russians supposedly have the fastest submarine in the world. But the thing about submarines is they are very secret and information is not released about the performance of the subs.

Answer by  praburajzz (37)

K-222 which was made by the Soviet Union was the fastest submarine in the world. its maximum speed is 44 knots (80km/hour).