The Waage Drill II diving accident occurred on 9 September 1975, when two divers died of heatstroke after the chamber they were in was inadvertently pressurised with helium gas.
The Waage Drill II diving accident occurred on 9 September 1975, when two divers died of heatstroke after the chamber they were in was inadvertently pressurised with helium gas. (en)
The Waage Drill II diving accident occurred on 9 September 1975, when two divers died of heatstroke after the chamber they were in was inadvertently pressurised with helium gas. (en)