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"Robert Boyle has at least as good a claim as any other individual to be the inventor of sonar.

The first device used to locate submarines is called Asdic (named after the Anti-Submarine Detection Investigation Committee) and was invented during World War I by British, American, and French scientists.

This system located underwater objects by transmitting an acoustical pulse of energy, then listening for any echoes returned from that object.

The innovation didn't come soon enough to make a difference in that conflict, but it laid the foundation for sonar detection in the years to come.