Breaking: Titanic tourist sub goes missing sparking search

Multi day trips to the wreck cost tens of thousands of dollars and one dive to Titanic, including both the descent and the ascent, reportedly takes around eight hours.

The famous shipwreck sits 3,800m (12,500ft) down at the bottom of the Atlantic. It is about 600km (370 miles) off the coast of Newfoundland, Canada.

The passenger liner, which was the largest ship of its time, hit an iceberg on its maiden voyage from Southampton to New York in 1912. Of the 2,200 passengers and crew onboard, more than 1,500 died.

The Titanic has been extensively explored since the wreck was discovered in 1985.