All six crew members were asleep aboard a scuba diving boat off the Southern California coast when a fire broke out in the middle of the night, killing 34 people who were trapped in a bunkroom below the main deck, federal investigators said Thursday.
Boats like the Conception, which caught fire around 3 a.m. on Sept. 2 and sank, are required to have a crew member keep watch at night.
The National Transportation Safety Board has been investigating the tragedy and released a two-page preliminary report that said five crew members were sleeping in their quarters behind the wheelhouse on the second deck and another below deck when the fire broke out.
The report comes as investigators seek to determine the cause and try to recover the wreckage of the Conception from the bottom of the sea amid an ongoing criminal probe conducted by the FBI, Coast Guard and the U.S. Attorney’s Office.
Divers on Wednesday recovered the remains of the last victim — one of dozens who died of smoke inhalation as they were trapped below a raging fire.
The Coast Guard has issued additional safety recommendations in the wake of the tragedy, such as limiting the unsupervised charging of lithium-ion batteries and the use of power strips and extension cords.

