The 75-foot Conception was owned by Truth Aquatics, Inc., and was on a three-day diving trip when it caught fire at anchor early in the morning on Sept. 2.

"Five crewmembers were asleep in berths behind the wheelhouse, and one crewmember was asleep in the bunkroom," at the time of the fire, according to initial findings. If true, that would be a violation of regulations requiring one crewmember to be awake to monitor the vessel throughout the night.