For years, a basic premise of sci-fi plots was that the presence of extra-terrestrial aliens was being hidden by the U.S. military.

Stargate SG1, for example, featured a highly secure installation that housed Egyptianized-alien devices that allowed a a top-secret team to travel instantly to planets all over the galaxy. I must admit, it tops Star Trek on my watch-list.

Plot-lines may have to be changed as the military is becoming much more open about the Unidentified Flying Objects it observes and records.

An investigation is underway after five Navy pilots have come forward to report strange unidentified flying objects spotted in the sky.

The pilots say they have had multiple mid-air encounters with high-flying, fast-moving objects that defy human capabilities.

The New York Times spoke with the pilots, who say they’ve all encountered UFOs during training missions up and down the east coast and noted the objects were “accelerating to hypersonic speed, making sudden stops and instantaneous turns, something beyond the physical limits of a human crew.”

“Clearly this is nothing that we’re used to seeing out there,” former Navy pilot Ryan Graves said. “So we submitted a safety report, saying that there was an unidentified object in our working space, and we don’t know what to do.”

The encounters reported were quite detailed.

“These things would be out there all day,” said Lt. Ryan Graves, an F/A-18 Super Hornet pilot who has been with the Navy for 10 years, and who reported his sightings to the Pentagon and Congress. “Keeping an aircraft in the air requires a significant amount of energy. With the speeds we observed, 12 hours in the air is 11 hours longer than we’d expect.”

In late 2014, a Super Hornet pilot had a near collision with one of the objects, and an official mishap report was filed. Some of the incidents were videotaped, including one taken by a plane’s camera in early 2015 that shows an object zooming over the ocean waves as pilots question what they are watching.

However, the Navy isn’t rushing to claim that these are extraterrestrial vehicles.

Josh Gradisher, a Navy spokesperson, told the newspaper that the U.S. Navy doesn’t have all the answers for the observations made by Lt. Graves and others.

“There were a number of different reports,” Gradisher said. Some cases could have been commercial drones, he said, but in other cases “we don’t know who’s doing this, we don’t have enough data to track this. So the intent of the message to the fleet is to provide updated guidance on reporting procedures for suspected intrusions into our airspace.”

The Navy has drafted new guidelines related to “unexplained aerial phenomena,” which is in response to the numerous sightings of unknown, highly advanced aircraft intruding on strike groups and other sensitive military formations and facilities.

“As part of this effort,” it added, “the Navy is updating and formalizing the process by which reports of any such suspected incursions can be made to the cognizant authorities. A new message to the fleet that will detail the steps for reporting is in draft.”

To be clear, the Navy isn’t endorsing the idea that its sailors have encountered alien spacecraft. But it is acknowledging there have been enough strange aerial sightings by credible and highly trained military personnel that they need to be recorded in the official record and studied — rather than dismissed as some kooky phenomena from the realm of science-fiction.

Furthermore, the public is not likely to get all the details related to these reports.

For instance, perhaps unclassified parts, broad overviews or statistics about the number of sightings could be released, Luis Elizondo, an intelligence officer who ran [the now defunct AATIP Advanced Aerospace Threat Identification Program (AATIP)] before leaving the Pentagon, told The Washington Post.

“If it remains strictly within classified channels, then the ‘right person’ may not actually get the information,” Elizondo said. “The right person doesn’t necessarily mean a military leader. It can be a lawmaker. It can be a whole host of different individuals.”

However, if they come across a Stargate, I would like to be told!