Search for Missing Titanic Submersible Intensifies as Oxygen Runs Low.

The exact location of the Titanic submersible and the condition of the five crew onboard are unknown. If the vessel is still intact, it may have just a few hours of oxygen remaining, creating a race against time to find the sub before it is too late. Running out of oxygen is not the only danger those on board face. The vessel may have lost electrical power, which is likely to have a role in controlling the amount of oxygen and carbon dioxide inside the vessel. The crew are also at risk from hypothermia, where the body gets too cold. Despite all these challenges, experts urge against cancelling the search-and-rescue operation too soon, saying they might be able to survive even when oxygen levels are very low.