"The Navy designates the objects contained in these videos as unidentified aerial phenomena" and "the phenomena contained/depicted in those three videos as unidentified," Gradisher said.
Vice's Motherboard later confirmed the statement, according to The Huff Post.
"The 'Unidentified Aerial Phenomena' terminology is used because it provides the basic descriptor for the sightings/observations of unauthorized/unidentified aircraft/objects that have been observed entering/operating in the airspace of various military-controlled training ranges," Gradisher said.
The videos show Navy pilots intercepting an object off the coast of San Diego in 2004 and twice in 2015.
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