Bathyscaphe Trieste
On 23 January 1960, she reached the ocean floor in the Challenger Deep (the deepest southern part of the Mariana Trench), carrying Jacques Piccard and Don Walsh. This was the first time a vessel, manned or unmanned, had reached the deepest known point of the Earth's oceans. The onboard systems indicated a depth of , although this was revised later to ; fairly recently, more accurate measurements have found Challenger Deep to be between and deep.
Martyn Farr
As well as running a cave diving training facility in South Wales, Farr is a regular contributor to diving magazines around the world. Farr has also acted as support diver in some of the world's most notable cave diving penetrations, including the British-led expedition to Pozo Azul in Spain in September 2010, which at of underwater travel is the world's longest cave diving penetration.