“Harry” is an Adelaide based anaesthetist and physician in diving medicine who has held a passion for all things aquatic since he was a small boy. He did his FAUI OW course with Adelaide Skin Diving Centre in 1979. In the mid 80’s he began cave diving and with the advent of “technical diving” his focus has more recently moved to utilising mixed gas rebreathers to explore and document caves in Australia, NZ and Vanuatu.