A “UFO” parked beside a Navy helicopter was spotted onboard a US aircraft carrier, YouTube footage of the landing of a US Navy F-15 fighter jet appeared to show.
The footage, slowed down for effect, was published by “Section 51”, a US-based conspiracy theory YouTube channel collecting footage of “unidentified flying objects”.
It shows a fighter shadowing a US jet as it comes into land, while a triangular object can clearly be seen beside a Navy helicopter.
Commenting on the video, many people believed the object was a TR-3B, a supposed anti-gravity spy plane vehicle some maintain the US air force is developing.
Another offered a detailed explanation, writing: “I think it's a TR-3B, the latest of the US's black projects vehicles.
“This is the next generation of secret technology developed by the skunk works and other secret development programs.
“It is in any case not alien. It might have been developed with the use of reverse-engineered alien technology. But built on this planet.”
Others were not so convinced, with user Jim Hatch penning: “Pretty sure they wouldn't leave it parked on the deck of an aircraft carrier, was it an alien spacecraft or some sort of secret technology?”
And others suggested the object was Photoshopped into the footage, joking about the triangle craft's “stealth shadow”.