The mysteries of the underwater world captivate our imagination, even for those of us who’ve never explored it in person. Observing marine life and the seabed satisfies our innate curiosity. Film and television documentaries convey powerful images and information. Unmanned devices now carry all manner of date loggers, sensors and cameras, enabling us to explore ever further and deeper. Yet nothing beats the sensation and unique experience you get from coming into direct contact with underwater life in all its glory.