It has often been said that we know more about the surface of the Moon than we do about the world's seas and oceans. The study of USOs (Unidentified Submersible Objects) is a case in point. For years, strange phenomena have been reported by people at sea, especially by navies around the globe. Although many of the USO files of the Soviet and Russian Navy remain secret, some have become available due to the painstaking efforts of dedicated researchers...