Longest time spent living underwater
Who
Unknown
Where
USA Key Largo,Florida
When
Richard Presley (USA) spent 69 days 19 min in a module underwater at a lagoon in Key Largo, Florida, USA from 6 May to 14 July 1992. The test was carried out as part of a mission entitled Project Atlantis which had as its aim to explore the human factors of living in an undersea environment.