This incredible video shows a colossal 91,000-ton heavy vessel off the coast of Cornwall.
The BOKA Vanguard, which costs $ 240 million (about £ 18.5 million) to build, can be seen off the coast of Cornwall near Mounts Bay.
The massive semi-submersible ship is the largest of its kind ever built and can carry loads up to 110,000 tons.
It is 275 meters long and 70 meters wide.
Watch the video below to see the huge ship
Video not available
It was built to move huge oil platforms and gas plants into the sea, but it can also transport entire other ships.
Despite its enormous size, it can travel up to 14 knots (16 miles per hour) and is manned by a crew of 40 people.
It took only a year to build, and it was launched in October 2012.
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