An unidentified submerged object (USO) is an unidentified object submerged in water. The U.S. Navy classifies USOs as whales, sharks, and other sea creatures that can interfere with ship maneuvering, sonar operations, and oceanographic research.[1]

See also

References

  1. ^ Christenson, Scot. "USOs Not UFOs Have Been the Greatest Threat to the Navy". usni.org. August 2022, Naval History Magazine, US Navy. Retrieved 21 September 2023.
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