The loadmaster, who has yet to be named, has broken a 37-year silence about the encounter that he failed to report at the time in December 1980 for fear of ruining his career.
However, the man reported the unexplained case to the Mutual UFO Network (MUFON) yesterday, just days after there were headlines across the globe revealing details about a top secret US Department of Defense five-year probe into the threat posed by UFOs.
Details of the Department of Defense Advanced Aerospace Threat Identification £16.5million secretive programme were exposed after the US Government claimed for years it had not interest in UFOs, something conspiracy theorists refused to believe.
US-based MUFON is the world’s largest organisation dedicated to UFO and alien research, and keeps a global database of UFO sightings and reports.
Loadmasters are responsible for getting cargo and personnel onto a plane.
In a report to MUFON the man explained he failed to officially report the sighting for fear of affecting his career, due to the perceived ridicule surrounding UFO sightings.
He said: “I was a loadmaster on an C-141 transport aircraft we took off from Charleston Air Force base Going to Dover Air Force base, Delaware, when we pick up an object on radar.
“The object was pacing our aircraft. We reported the incident to the tower they also saw the object, but said we may have a problem with our radar.
“Once we landed at Dover the technicians checked out the radar on the aircraft and found no problems.”
He said the plane then set off again from Dover towards Ireland.
The loadmaster said: “Half way across the Atlantic Ocean the object returned and continue to paced us the rest of the way across the ocean.
“We once again contacted the tower to report the incident and the tower confirmed that they also had the object on radar.
“At this, we were asked if the crew wanted to file a UFO report.
“We discussed it as a crew and decided it would be bad for our careers so no report was filed.”
MUFON is investigating the case, but cautions that most sightings can be explained.
The man joins a growing number of military and airline witnesses to come forward with details of seemingly inexplicable UFO encounters.
These include Cmdr David Fravor, a former US navy pilot, who was one of two men who filmed on radar cameras a shocking UFO encounter off the coast of San Diego that was looked at by the Department of Defense probe, with no explanation coming forward.
Bombshell video of what Mr Fravor and Cmdr Jim Slaight saw was released with the recent revelations.
Mr Fravor said they encountered the oval shaped white UFO “which defied physics” at the end of a two-week period when the US Princeton ship had been tracking mysterious aircraft that appeared suddenly at 80,000 feet, before shooting down towards the ocean.
They stopped at 20,000 feet and appeared to hover, before dropping off range or heading back upwards.