His Lifeline Snapped 300 Feet Underwater

Three hundred feet beneath the North Sea, Chris Lemons feels his lifeline tighten. Above him, the support ship is drifting away, pulling the diving bell with it. When his umbilical breaks, he loses his main breathing supply, communication and hot water. He has emergency gas on his back—but the route to safety is moving farther away. Why can't he simply swim to the surface? On September 18, 2012, a working dive aboard Bibby Topaz became a race to bring one man back from the seabed. Follow the chain of failures, the underwater search and the rescue by Dave Yuasa and Duncan Allcock. Along the way, we explain the pressure trap that keeps saturation divers from surfacing, and why losing the main supply is different from having no oxygen at all. CHAPTERS 00:00 His Exit Is Moving Away 00:28 The Dive and the Pressure Trap 02:07 The Ship Starts Drifting 03:05 His Lifeline Breaks 04:14 The Race to Get Back 05:22 The Camera Finds Chris 06:07 Dave Goes Back 07:02 How Did He Survive? 07:48 Still Under Pressure 08:17 Back to the Same Worksite VISUAL SOURCE CREDITS Floating Harbour / Lifeline; original Bibby Topaz ROV recording. Last Breath Ltd / Floating Harbour. Courtesy Chris Lemons via The Guardian. Skipsteknisk / Volstad Maritime. ShipPhotos.co.uk. MarineLink. NOAA Ocean Exploration — illustrative footage from other vessels, locations and dates. MUSIC & SOUND Original generated instrumental scores from the TINY EXIT production collection. Additional sound design created for this episode. ABOUT THE VISUALS Visual reconstructions include AI-generated illustrations and explanatory schematics. They illustrate the account and are not recordings of the accident. Source documentary reconstructions are distinguished from original incident imagery; schematics are not to scale. General equipment and vessel images may have been recorded at other times. The later scientific analysis is a proposed explanation, not a continuous measurement of Chris's oxygen supply. #ChrisLemons #SurvivalStory #DeepSeaDiving