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Jacques Mayol became the first person to freedive to a depth of 100 metres (330 ft).

Historical image related to Jacques Mayol became the first person to freedive to a depth of 100 metres (330 ft). from November 23, 1976

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Jacques Mayol

French free diver (1927–2001)

Jacques Mayol was a French diver and the holder of many world records in free diving. The 1988 film The Big Blue, directed by Luc Besson, was inspired by his life story and that of his friend, Enzo Maiorca. Mayol was one of the screenwriters and authored the book Homo Delphinus:…
Source: Wikipedia (CC BY-SA)

Freediving

Underwater diving without breathing apparatus

Freediving, free-diving, free diving, breath-hold diving, or skin diving, is a mode of underwater diving that relies on breath-holding until resurfacing rather than the use of breathing apparatus such as scuba gear.
Source: Wikipedia (CC BY-SA)