What we know about the missing Titanic sub

FILE PHOTO: British billionaire Hamish Harding, who is said to be among the passengers onboard the submarine that went missing on trip to the Titanic wreckage is seen in this handout picture taken in flight, July 2019. Courtesy of Jannicke Mikkelsen/via REUTERS/File Photo

(Reuters) -A five-person submersible vessel taking wealthy adventurers on a $250,000 trip to see the wreckage of the 1912 Titanic disaster 12,500 feet (3,800m) undersea is missing in the Atlantic off Canada.

Following is what we know so far: