article_snippet: Submarine: Director James Cameron has also used Mr Allen's submarine, to dive to the depths of the Ocean' .
article_snippet: Allen's yacht is not just for exploring, however, Allen's yacht is also luxurious enough to entertain Allen's yacht friends - pictured here leaving the boat for the Olympic opening ceremony .
article_snippet: Director James Cameron has also used it, for a seven-hour solo journey to Google Earth's deepest point back in 2012.
article_snippet: But Mr Allen is not confined to undersea exploration, either.
article_snippet: The American is also working on a project called Stratolaunch, which aims to put 'cost-effective' cargo and manned missions into space.
article_snippet: Mr Allen launched SpaceShipOne, the first privately built craft into suborbital space in 2004.