The Coast Guard is leading the investigation into the incident, and the National Transportation Safety Board said Friday it will assist. I don't think anybody even had the time to realize what happened." So, this would have happened very quickly. "And it's probably a mercy, because that was probably a kinder end than the unbelievably difficult situation of being four days in a cold, dark and confined space. "It implodes inwards in a matter of a thousandth of a second," Kohnen said. "in a fraction of a second, it's gone," Will Kohnen, chairman of the professional group the Marine Technology Society Submarine Committee, told the Reuters news agency.
Such an implosion, under the intense pressure of the depths of the sea, would have destroyed the vessel almost instantly, experts explained. The information was relayed to the Coast Guard, which used it to narrow the radius of the search area, the official said. Navy official said the Navy had detected "an acoustic anomaly consistent with an implosion" shortly after the sub lost contact with the surface Sunday, CBS News national security correspondent David Martin reported.