As the anniversary of California’s deadliest maritime disaster in modern history nears, the National Transportation Safety Board announced it will hold a hearing in October to reveal the results of its investigation into the Conception dive boat fire that killed 34 people off Santa Cruz Island.

A preliminary NTSB investigation concluded that five members of the crew were asleep in the wheelhouse and that there was no roving watch on the vessel operated by Santa Barbara-based Truth Aquatics as required by the U.S. Coast Guard during the hours when passengers were asleep below deck.

But the more extensive examination of the origins, cause and events leading up to the Conception being burned to the waterline has taken months of investigation led by NTSB board member Jennifer Homendy. The board will vote on findings, probable cause and recommendations for changes to small passenger vessels to avoid a repeat of what its chairman called a “horrible, horrible tragedy.”

“We have substantially completed our investigation,” said Eric Weiss, an NTSB spokesman. Weiss said that in the coming weeks NTSB staff will make public interviews, research and other investigative materials before the public hearing.

Read the full story on LATimes.com.