The term UFO has been accepted worldwide as unidentified flying objects, and these objects have been seen literally everywhere. They were eventually followed by the term USO or Unidentified Submersible Object which are craft witnessed traveling through water. The military decided to destigmatize the term UFO and change it to UAP or Unidentified Aerial Phenomenon, which is the currently accepted government and military term. Recently the term Transmedium UFO has become popular and refers to a UFO’s ability to travel through space, air, and water and possibly even land. On July 15, 2019 the crew of the USS Omaha witnessed a transmedium object enter the ocean and you can learn more about this event, which was released by George Knapp and Jeremy Corbell, along with a lot of other cool stuff HERE.