Federal accident investigators are considering launching another search of the wreckage of a freighter that sank in October in an attempt to locate the ship’s “black box.”

Tom Roth-Roffy, the lead investigator for the National Transportation Safety Board, told The Associated Press that a weekslong search found one of the El Faro’s missing decks, but not the mast where the ship’s voyage data recorder was attached. The agency on Sunday released the first images of the ship in its final resting place.