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.
Woodville Karst Plain Project
WKPP divers hold every deep (below ) distance record in underwater cave diving. WKPP director Casey McKinlay and Jarrod Jablonski hold the world's record for the greatest distance below ) from air in a cave dive - each way at Wakulla Spring at an average depth of . This record dive required more than 29 hours submersion including 16 hours of decompression (also a record). The WKPP also hold the world's record for the longest traverse between two known entry points - one way between Turner Sink and Wakulla Spring at an average depth of . The WKPP is also responsible for exploring and mapping more cave passageway below 190ft than any other organization in the world - . In total, WKPP explorers have mapped and explored as of June, 2018.