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They were used by submarines to navigate when not in open waters, They were also used by submarines and anti-submarine ships to locate enemy submarines.
no
10 mph underwater 20 mph surface
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Yes
During World War 2, it is reported that over 2,000 variants of Japanese Submarines were used during World War 2. Out of this, it is estimated that 10,000s were likely to be used during WW2.
326
Underseaboats.U-boats
Wolfpack
Both sides, the Allies and the Axis, had submarines when WW2 started.
The British lost 76 submarines during WWII.
Underseaboats.U-boats
52
759
9
They were used extensively throughout the war - from beginning to end.