The Deepsea Challenger, the submarine that James Cameron piloted to the Challenger Deep, the deepest point on the ocean floor, was made mostly of syntactic foam.
"In 2005, he began working on building a submersible capable of carrying Cameron to the deepest point on the planet, the Mariana Trench. Working on a tight budget and in utter secrecy, Allum not only researched, co-designed and oversaw the build of the vehicle, but using a cake-mixer, invented a special foam capable of withstanding the intense water pressure 11 kilometres below the ocean’s surface."
"In 2005, he began working on building a submersible capable of carrying Cameron to the deepest point on the planet, the Mariana Trench. Working on a tight budget and in utter secrecy, Allum not only researched, co-designed and oversaw the build of the vehicle, but using a cake-mixer, invented a special foam capable of withstanding the intense water pressure 11 kilometres below the ocean’s surface."