Nina Preisner recently broke the world record for the deepest dive by a woman to a sunken wreck. In just four minutes, she descended 525 ft – nearly 160 metres – to reach a Cypriot cargo vessel resting on the floor of the Red Sea. She talks to Miriam O'Reilly and describes how she battled strong currents and endured pressure which compressed her wetsuit from 5mm to half a millimetre in thickness.
