The AIDA Freediving World Championships – in pictures

A safety diver checks the line before the competition in Kalamata, Greece Photograph: Fred Buyle/Hungry Eye Images

Ed Wardle, from Alone in the Wild fame, takes his last breath before descending Photograph: Sebastian Rich/Hungry Eye Images

Run Hallum Sorenson from Denmark, who ranked 8th with 68m – a Danish record
Photograph: Fred Buyle/Hungry Eye Images

Air in Carlos Coste's mask escapes on his ascent Photograph: Fred Buyle/Hungry Eye Images

Dave Tranfield dives in the CNF category – constant weight no fins Photograph: Fred Buyle/Hungry Eye Images

A safety diver keeps a close eye on a competitor as he ascends to the surface Photograph: Fred Buyle/Hungry Eye Images

A happy competitor completes a successful dive to his target depth Photograph: Fred Buyle/Hungry Eye Images

A competitor in the constant weight category wearing a mono-fin, dives into the deep Photograph: Fred Buyle/Hungry Eye Images

William Trubridge is an exceptional athlete who has taken the CNF category to previously unheard of depths, swimming 101m breaststroke down and back up without touching the rope Photograph: Fred Buyle/Hungry Eye Images

Using no fins, the diver swims down the line to his or her target depth and attempts to return before blacking out Photograph: Fred Buyle/Hungry Eye Images

Each diver is given a start time and within 30 seconds of that time they must take one last breath and dive into the deep. Photograph: Fred Buyle/Hungry Eye Images

The world record of 124m is currently held by Herbert Nitsch of Austria Photograph: Fred Buyle/Hungry Eye Images