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.
David Apperley
A renowned technical cave diver (one of the most dangerous and demanding sports in the world) and gifted marine electrical technician of over two decades, Dave stood out in the field of international deep sea exploration when James Cameron employed him as Lead Safety Diver and Emergency Rescue Manager on the 2012 ‘DeepSea Challenge Project’/Mariana Trench Expedition, which saw Cameron solo man a 12-ton submersible to the deepest point of the Earth’s oceans.