As a desperate search continues off the southeastern coast of Canada for a missing submersible carrying tourists to the wreckage of the Titanic, experts are weighing in on what could have gone wrong.

The OceanGate submersible carrying five people, including the pilot, disappeared off radar on Sunday morning, two hours after beginning its descent toward the historic wreckage.

As the days ticked on, experts and rescuers have said the search operation is a race against the clock as the vessel only has enough oxygen to sustain the passengers for several days.

Butch Hendrick, a diving and water rescue expert, offered his insights during a Tuesday interview on “News All Day” on the situation and what could have gone wrong.