The National Transportation Safety Board announced Monday afternoon that its search for the voyage data recorder from the sunken cargo ship El Faro ended unsuccessfully.

The 790-foot ship disappeared on Oct. 1 on a regular weekly cargo route between Florida and Puerto Rico after the captain reported losing propulsion and taking on water during Hurricane Joaquin.

Among 33 crew members lost aboard the ship were five with Maine connections: 53-year-old Capt. Michael Davidson of Windham, a 1988 graduate of Maine Maritime; Michael Holland, 25, of Wilton, a 2012 graduate of Maine Maritime; Danielle Randolph, 34, also of Rockland and a 2004 graduate of Maine Maritime; and Dylan Meklin, 23, a 2010 graduate of Rockland District High School and a 2015 graduate of Maine Maritime Academy. Another crew member, Mitchell Kuflik of Brooklyn, New York, graduated from Maine Maritime in 2011.

On Oct. 31, the ship was found in about 15,000 feet of water in the vicinity of its last known position near Crooked Island, Bahamas.

Searchers from the USNS Apache were able to view video of the vessel obtained from a remotely operated vehicle capable of deep sea searches. According to a news release, that video revealed that the navigation bridge structure and the deck below had separated from the ship. The missing structure included the mast and its base, where the voyage data recorder — similar to a plane’s “black box” — was mounted.

On Nov. 11, the navigation bridge was found, but neither the mast nor the voyage data recorder were located. Five more days of searching ended Monday without success, but NTSB officials remain hopeful they will be able to determine what caused the ship to sink.

“Over the years we’ve completed many investigations without the aid of recorders and other investigative tools,” NTSB Chairman Christopher Hart said in the release. “While it is disappointing that the voyage data recorder was not located, we are hopeful that we’ll be able to determine the probable cause of this tragedy and the factors that may have contributed to it.”

Reuters and BDN writer Beth Brogan contributed to this report.