Where is the Titanic wreck located? What to know after submarine goes missing in Atlantic

The search for a missing Titanic tourist submarine, carrying five people, continued Tuesday after the watercraft vanished deep in the Atlantic Ocean with about three days worth of survival capability left.

The U.S. Coast Guard in Boston is leading the search for the missing submersible, which was reported overdue Sunday night about 435 miles south of St. John’s, Newfoundland, the Joint Rescue Coordination Centre in Halifax, Nova Scotia, said. 

The Coast Guard is using tools ranging from sonar technology to aircraft to search below the water and on the ocean's surface. The operation's location − about 900 miles east of Cape Cod and up to 13,000 feet deep − complicates the task.

Here's what to know about the Titanic's location.

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

Where did the Titanic sink? 

On April 14, 1912, the Titanic collided with an iceberg in the North Atlantic Ocean on its maiden voyage from Southampton, England, to New York City. On April 15, at about 2:20 a.m., the ship sank.

How deep is the Titanic?

The 21-foot submersible was traveling to the wreckage site of the Titanic, which is about 2.4 miles below the surface.

The watercraft left from St. John's on June 16 and lost contact with the ship that was monitoring it about an hour and 45 minutes later. It usually takes two-hours to visit the ship.

Titanic tourist submarine still missing:Live updates as rescuers race against time

Where is the Titanic wreck location on a map?

The Titanic lies about 370 miles off the coast of Newfoundland, Canada, in the Atlantic Ocean.

Who is on board the missing sub?

This was OceanGate Expeditions' third annual voyage to the wreckage site. The Coast Guard said there was one pilot and four people on board who paid to come along the expedition. 

British businessman Hamish Harding, who holds three Guinness World Records, is one of the people on board, according to Action Aviation, a company for which Harding serves as chairman.

Shahzada Dawood and his son Suleman, members of one of Pakistan's most prominent families, were also on board, according to a family statement sent to the AP.

French explorer and Titanic expert Paul-Henry Nargeolet also was on board, according to David Gallo, a senior adviser for strategic initiatives and special projects at RMS Titanic. 

A group of tourists in 2021 paid $100,000 to $150,000 apiece to go on the trip. OceanGate’s website said the “mission support fee” for the 2023 expedition was $250,000 a person. OceanGate Expeditions is a Washington-based deep-sea exploration company.

Who is on the missing Titanic sub?Passengers include Hamish Harding, Shahzada Dawood

What is the difference between a submersible and a submarine?

A submersible is a vessel in the submarine family but smaller and less self-sufficient than the classic military sub.

Contributing: Jorge L. Ortiz, Donovan Slack and Claire Thornton, USA TODAY and The Associated Press