If electrical power within the vessel has already been lost, rising levels of carbon dioxide may have led to hypercapnia, affecting muscle control and reasoning. If left untreated, it can be fatal.
Titanic tourists likely died terrified from Co2 poisoning within hours of disappearing msn.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from msn.com Daily Mail and Mail on Sunday newspapers.
The Daily Express going through the National Archives of the British Ministry of Defense unearthed details of a secret operation in the aftermath of the Falkland Islands War to recover what were considered sensitive information and weapons, fearing they might fall into the hands of curious Soviets roaming the area.