The fire on the Conception diving boat killed 34 people last September.

Divers have recovered the body of the final missing victim of a boat fire off the Southern California coast that killed 34 people last week.

The report indicates no night watchman was roaming the three-deck vessel when the fire broke out.

The chartered dive boat caught fire near Southern California's Channel Islands.

Investigators are focusing on the layout of the boat and a possible design flaw of the escape hatch in the sleeping quarters.

Twenty people have been safely removed from a 656-foot vessel named the Golden Ray after it became disabled on the St. Simons Sound off the coast of Brunswick, Georgia, around 2 a.m. Sunday.

The Conception owner Glen Fritzler said the crew says they tried to save passengers on the boat but the flames pushed them back.

Authorities with the National Transportation and Safety Board are investigating the cause of the California boat fire that killed 34 people.

Only five people on the Conception survived after the boat caught on fire.

The NTSB reported the crew said they desperately tried to get to the 34 passengers sleeping below deck, but the doors were overcome by flames.

The big question is what sparked the early-morning blaze that trapped the victims in their sleeping quarters below deck; the victims included an engineer and marine biologist.

Investigators '100%' certain they will find cause of deadly dive-boat fire.

33 bodies have been discovered, 1 is still missing after the 75-foot commercial vessel caught on fire.

The remains of 20 victims were recovered after a 75-foot charter diving boat, named the Conception, caught fire off Santa Cruz Island on Monday.

The brother of marine biologist and diving instructor Kristy Harmeling told ABC News his sister was "very serious about safety" and has dove "thousands of times."

Kristy Finstad is among dozens of people believed to have died aboard a dive boat that burst into flames early Monday off the coast of Southern California.

The search continues for those unaccounted for, officials said.

Authorities said the sleeping area had no doors and the passengers were trapped by the inferno.

The remains of 20 people -- 11 female and nine male -- were found after a boat caught fire off California's Santa Cruz Island, police announced on Tuesday.

Investigators are continuing to work to recover remains from a fire on a diving excursion boat.

Will Carr reports on the diving boat carrying 39 people off California’s Santa Cruz Island that caught fire and has so far left eight dead.

Bob Hansen speaks to "GMA" about the incident off of California's Santa Cruz Island as rescuers continue to search for survivors.

Rescue efforts are underway for more than 30 people on a boat on fire near Santa Cruz Island, California, the Coast Guard confirmed.

Five crew members were able to leap off the boat during the fire; four bodies were recovered from the scene, according to the Coast Guard.

Rescue efforts are underway for more than 30 people on a boat on fire near Santa Cruz Island, California, the Coast Guard confirmed.

Ventura County officials "fear numerous fatalities" as rescue operations are underway for boat on fire near Santa Cruz Island, California, Monday morning.

Ventura County officials "fear numerous fatalities" as rescue operations are underway for boat on fire near Santa Cruz Island, California, public information officer Bill Nash told ABC News.