They try out the dangerous challenge of free diving - deep diving without breathing apparatus.

Sietas started free diving in the year 2000.

Jacques Mayol (1927-2001), was the holder of many world records in free diving.

However these devices hinder and prevent a snorkeler from free diving to any depth.

Popular location for world championships of free diving.

She holds numerous world records in different categories of free diving.

The previous year she had taken up free diving as a change from scuba.

Maiorca held 13 world records in the "No Limits" class of free diving between 1960 and 1974.

Also, it is popular for many other watersports, including scuba and free diving.

No, I mean free diving with personal mask and air tank.