Japanese submarine I-21
Type B1 submarine
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I-21 was a Japanese Type B1 submarine which saw service during World War II in the Imperial Japanese Navy. She displaced 1,950 tons and had a speed of 24 knots. Wikipedia
Launched: February 24, 1940
Length: 108.6 m (356 ft 4 in)
Range: 14,000 nmi (26,000 km) at 16 kn (30 km/h; 18 mph)
Test depth: 100 m (330 ft)