ww2 submarines usually tried to hunt down and destroy enemy subs, sink high value ships like aircraft carriers or attack trading/commercial ships.
ADDED: The Allied navies' submarines were generally used against enemy warships. The main target of the Nazi U-boats was the merchant-shipping convoys on the Atlantic, though others certainly did roam further to attack naval vessels. One U-boat even managed to sink a ship within the St. Lawrence Seaway, but they normally patrolled much further out.
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 extensively throughout the war - from beginning to end.
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
Underseaboats.U-boats
Wolfpack