Canadian Coast Guard ship joins search efforts for missing Titanic submersible

A Canadian military surveillance aircraft has detected underwater noises as a massive search continued early Wednesday in a remote part of the North Atlantic for a submersible that vanished while taking five people down to the wreck of the Titanic. A statement from the U.S. coast guard did not elaborate on what rescuers believed the noises could be, though it offered a glimmer of hope for those lost aboard the Titan as estimates suggest as little as a day's worth of oxygen could be left if the vessel is still functioning. The coast guard wrote on Twitter that a Canadian search aircraft had "detected underwater noises in the search area." Searchers then moved an underwater robot to that area to search. However, those searches "have yielded negative results but continue."