They use sonar to find the enemy. Passively, they listen for the sounds of the other ships, which will give them a bearing to the target. Active sonar will ping the enemy and provide a range as well.
sonar hydrophones
World War I submarines were primarily used to locate and attack surface cargo and warships.
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.
Type your answer here... ASDIC
Submarines used torpedoes in anti-shipping roles hoping to cripple the enemies ability to supply and reinforce points of conflict as well as to hamper the enemies economy .
nucturnal pooh
During World War I, the primary instrument used to detect the sound of submarines was the hydrophone. This underwater listening device allowed ships to detect the noises made by submarines, such as engine sounds and propeller movements. Hydrophones were often deployed in arrays and played a crucial role in anti-submarine warfare, helping to locate and track enemy submarines.
Sonar was used widely in World War II in an effort to locate enemy submarines. It wasn't as sophisticated as it is today, but it did help. Actual numbers are difficult to come by, but sonar was effective in the successful attacks on several submarines.
During WW2, all the major countries involved used submarines.
X-rays are commonly used to locate cavities in teeth. This imaging technique allows dentists to see areas of decay or cavities that may not be visible to the naked eye.
Sonar is an acronym for "Sound Navigation and Ranging." It refers to a technique that uses sound waves to detect and locate objects underwater, such as submarines or underwater terrain. By emitting sound pulses and analyzing their echoes, sonar can determine distances and create images of submerged objects. This technology is widely used in marine research, navigation, and fishing.
During WWII, Allied warships used ASDIC (an early, crude form of Sonar), airplanes (some ships carried recoverable seaplanes), and visual lookouts (binoculars) to spot submarines and direct attacking vessels to the contact.