Search underway for Titanic tourist submarine with 70-96 hours of oxygen left

The U.S. Coast Guard in Boston is leading the search for the missing watercraft, which the Joint Rescue Coordination Centre in Halifax, Nova Scotia, said was reported overdue Sunday night about 435 miles south of St. John’s, Newfoundland.Rear Adm. John Mauger, commander of the First Coast Guard District, said two aircraft each from the U.S. and Canada were involved in the search, along with a commercial ship, and that further assets will be added as the pursuit continues into the night.