Disclaimer: I do not own any clips or music. All clips and music belong to their respectful owners. I do not earn any money with this video. This video is for .\rbr\rbrHistorical USOs Unidentified Submerged Objects Sightings - Top Documentary Films Please Subscribe my Channel: Facebook .\rbr\rbrAn unidentified submerged object, or USO, is any object or optical or mechanical detection phenomenon of unknown origin observed under water that remains .\rbr\rbrAn unidentified flying object, or UFO, in its most general definition, is any apparent anomaly in the sky that is not identifiable as a known object or phenomenon.