Cause of death: accident
Natalia Vadimovna Molchanova (Russian: Наталья Вадимовна Молчанова; 8 May 1962 – 2 August 2015) was a Russian champion free diver, multiple world record holder, and the former president of the Russian Free Dive Federation. She has been described as "possibly the world’s greatest freediver".
Molchanova's son is Russian freediving champion Alexey Molchanov.
On 2 August 2015, Molchanova vanished in Formentera while giving a private lesson. Search efforts were abandoned on 5 August and she was presumed dead.
Source : Wikipedia
