Soviet K-class submarine

Class of ship

The K class were the largest submarines built for the Soviet Navy in the World War II era. Wikipedia

Propulsion: 2-shaft diesel electric, 8,400 hp (6,300 kW) diesel, 2,400 hp (1,800 kW) electric

Speed: surface – up to 22.5 knots (41.7 km/h; 25.9 mph); submerged – 10 knots (19 km/h; 12 mph)

Test depth: 230 ft (70 m)