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Nalini Chetty invites you into the extraordinary world of Saturation Diving, where the divers are artificially kept at a pressure resembling that of the seabed. Lloyd Blyth shows you around his compression chamber which is situated in the belly of the ship. He shares it with two other divers for up to 28 days at a time - they're kept at a working depth of up to 200m. It means they can make as many trips down to the seabed as they need to without the risk of decompression complications.