Hidden killer: Incredible force at depth of 3,800 meters

A "catastrophic implosion", such as that believed to have destroyed the Titan submersible, would have happened with incredible force and speed given the crushing water pressure on the floor of the ocean.

The remains of the Titanic rest on the seabed in the North Atlantic at a depth of some 3,800 meters.

At sea level, atmospheric pressure is 14.7 pounds per square inch, or psi, which equals 101.3 kilopascals.