A tourist submersible carrying five passengers to survey the wreck of the Titanic has gone missing, and with the passengers’ limited oxygen supply depleting with every passing hour, the U.S. Coast Guard has confirmed that the rescue efforts have now become a race against the clock. Tom Maddox of Underwater Forensic Investigators was once a member of the 2005 Titanic submarine expedition, and he recounts how dangerous this voyage can be. He joins the podcast to explain what obstacles rescuers are confronting as they search for the missing vessel, what may have led to OceanGate’s submersible going missing in the first place, and the conditions that the five passengers are likely experiencing as authorities desperately search for clues to their location.