Federal investigators released photos and video Sunday of the wrecked El Faro, the cargo ship that went down in the Atlantic Ocean during a hurricane last year with 33 people aboard.
The El Faro left Jacksonville, Florida, on Sept. 29, and lost contact as Hurricane Joaquin grew into a category 4 storm. Its wreckage was found Oct. 31 in 15,000 feet of water 36 nautical miles northeast of Crooked Island in the Bahamas.
The National Transportation Safety Board broke six weeks of silence on the investigation Sunday by releasing its accident docket, along with 47 minutes of underwater video and nine photographs.
The docket included no investigative report. In a lawsuit against the ship's owners last year, the family of one of the sailors alleged that the ship "had a history of losing power while under voyage and during hurricanes."
In an interview that aired Sunday on CBS's "60 Minutes," marine engineer Thomas Roth-Roffy, the NTSB's lead investigator on the case, called the inquiry "the most difficult and complex investigation I've ever worked on" in 17 years with the agency.
See more of the ship before and after it sank:
El Faro cargo ship sinks
Video, photos relay eerie quiet of El Faro's final resting place
El Faro, provided by TOTE Maritime Services
ROCKLAND, ME - OCTOBER 5: John Gerry, a cousin of Dylan Meklin, is overcome with emotion after a candlelight vigil in honor of Meklin at the Fishermen's Memorial in Rockland Harbor Monday, October 5, 2015. Meklin, along with three other Mainers and 29 other souls, were aboard El Faro, a cargo ship which is believe to have sunk in the path of Hurricane Joaquin. 'I played football with him and everything,' said Gerry. (Photo by Gabe Souza/Portland Press Herald via Getty Images)
ROCKLAND, ME - OCTOBER 5: A candlelight vigil was held at the Fishermen's Memorial in Rockland Harbor for Dylan Meklin, 23, of Rockland, and Danielle Randolph, 34, also of Rockland, Monday, October 5, 2015. The pair are among four Mainers and 29 other souls who were aboard El Faro, a cargo ship which is believe to have sunk in the path of Hurricane Joaquin. (Photo by Gabe Souza/Portland Press Herald via Getty Images)
CASTINE, ME - OCTOBER 6: Travis Emerson, right, comforts Alexi Galley after a vigil for the crew members of the cargo ship El Faro, which is believed to have sunk off the Bahamas during Hurricane Joaquin. Four of the ship's crew, Capt. Michael Davidson of Windham, Michael Holland of Wilton, Danielle Randolph of Rockland and Dylan Meklin, both of Rockland, are all graduates of Maine Maritime Academy. (Photo by Gregory Rec/Portland Press Herald via Getty Images)
U.S.C.G. Cpt. Mark Fedor, right, and Lt. Cmd. Gabe Somma brief the media on the search for survivors of the cargo ship El Faro that sank during Hurricane Joaquin at the Coast Guard Station at the Opa Locka Airport on Monday, Oct. 5, 2015. (Walter Michot/Miami Herald/TNS via Getty Images)
OPA LOCKA, FL - OCTOBER 05: U.S. Coast Guard Captain Mark Fedor (L) and Lt. Commander Gabe Somma walk away after speaking to the media, at U.S. Coast Guard Station Miami, about the sinking of the 790-foot container ship El Faro on October 5, 2015 in Opa Locka, Florida. The Coast Guard has concluded that the ship most likely sank after encountering Hurricane Joaquin last Thursday, but Coast Guard cutters and aircraft and a U.S. Navy plane continued searching for the 33 missing crew members. (Photo by Joe Raedle/Getty Images)
#BreakingNews @USCGSoutheast C-130 just lands, reports 225 SqMi debris field of styrofoam, wood, cargo, other items. http://t.co/4us2EP4L4C
#BreakingNews: @USCGSoutheast MH-60 refueling at sea as search crews cover 70K+ sqNM in the search for 790' #ElFaro http://t.co/6ICMmxraO2
#BreakingNews @USCGSoutheast Video Release: Recovery of #ElFaro life ring. http://t.co/X0RfPsheTM
#BreakingNews: @USCGSoutheast search for #ElFaro has covered more than 30K sqNM. http://t.co/hBlBWAl0GK http://t.co/9H4PVf4wyM
#BreakingNews @USCGSoutheast aircrew searching IVO #hurricane #Joaquin for container ship w/ crew of 33. http://t.co/cpEfzRi5G1