They were used extensively throughout the war - from beginning to end.
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.
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.
Yes
USSR; US; UK; Germany & Japan.
Sonar was used to detect and hunt submarines in WW2
Germany was first to use submarines in World War 1 knwn as " U- 2 ". Later on UK and USA produced their own version. - b sharma.
They're german submarines, used in world war 1 and world war 2
Submarines.
326
Wolfpack
Underseaboats.U-boats
They were submarines (German Untersee boat) used to sink ships carring men and materials to war fronts