"Search for Missing Sub Near Titanic: Coast Guard Reports Banging Noises and Sounds"

The US Coast Guard is bringing in more ships and vessels to search for a submersible that went missing in the North Atlantic while bringing five people down to the wreck of the Titanic. A Canadian surveillance vessel has detected underwater noises in the area, but the exact location and source of the sounds has not yet been determined. The vessel is estimated to have as little as a day’s worth of oxygen left if it is still functioning. The search area is twice the size of Connecticut in waters 2 1/2 miles deep, making it an extremely challenging environment to conduct a search-and-rescue mission.