Bound and his team had been planning this trip for months. They studied descriptions left by Frank Worsley, captain of the Endurance. Using the notes, Bound came up with a “Search Box,” or search area. It was an area measuring about 8 miles wide and 15 miles long. He guessed the ship had sunk somewhere in that part of the ocean.
The seafloor there is too cold and deep for divers to survive, even in special gear. So Bound brought a new submersible, called Sabertooth. A submersible is a small underwater vehicle. From the ship, Bound’s crew guided Sabertooth as it sent back photos and videos.
Sabertooth dove deep into the Search Box. On its first few tries, it failed to find the shipwreck. But Bound was determined.