Tourist Submarine Goes Missing During Titanic Expedition, Rescue Mission Ongoing

The port bow railing of the Titanic lies in 12,600 feet of water about 400 miles east of Nova Scotia, Canada, in a file photo. Reuters

A tourist submarine has gone missing while exploring the Titanic shipwreck in the Atlantic Ocean.

The Boston Coast Guard said a search and rescue operation was underway for the small submersible craft, which takes tourists to view the famous shipwreck 370 miles (600 km) off the coast of Newfoundland, Canada.