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.
Richard Stanton (cave diver)
In 2004 Stanton and Volanthen set a world record for greatest depth achieved in a British cave, cave diving at Wookey Hole in Somerset.
In 2010 Stanton, Volanthen, Jason Mallinson, and René Houben set a world record for longest cave penetration dive, obtaining in the Pozo Azul cave system in the Rudrón Valley in Spain.