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It's like something out of a science fiction film, but it could be closer to use in reality that we might think.
In the video clips, the Royal Navy soldiers take off from one boat, steady themselves above the water, then fly onto another ship in order to simulate storming the vessel.
Then, he just reverses the whole procedure and glides back off the stormed ship and back to the original boat.
Honestly, imagine being a pirate floating in the Indian Ocean and seeing one of these guys heading towards you.
Well, it could be the norm before long, if the technology keeps improving, and being proven to work.
In another video, the US Naval Institute showed four guys wearing jet suits launching off from a ship at the same time and fly towards another ship that - we can only assume - is being used as part of the test.
They climb high up into the sky before circling around the ship, landing down safely on it, then flying back for a handshake for a job well done.
This jet pack creation is the brainchild of a British technology start-up company called Gravity Industries.
Richard Browning, the CEO and founder of the company, has exhibited the capabilities of the suit on several occasions around the world.
He's not the bloke flying around Los Angeles International Airport, in case you've heard about that one.
The technology gives the person wearing it the power of flight through the power of five mini-jet engines - like tiny versions of what you'd expect to see on a plane - and offers those using it a flight time of about eight minutes.
To be fair, that's about all you'd need in order to storm a ship if everyone is dumbstruck at the thought of soldiers on jet packs flying towards them.
It produces 1,000 brake horsepower, and can attain speeds of up to 55 miles per hour.
Alongside the footage, which lasts for about a minute and a half, the US Naval Institute said: "The Royal Navy has been testing Jet Suit assault teams to determine if the Iron Man-like suits could be used to rapidly swarm and board ships.
"U.S. Special Operations Command is also evaluating a jetpack that can reach speeds of more than 200 mph."
200 miles per hour? That's incredible.
Featured Image Credit: US Naval Institute/Twitter
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