Atlantis is a recreational submarine modified from a decommissioned U.S. submarine. There are 48 seats on board. Tourists sit sideways in comfortable seats in the cabin, facing a circular pressure-resistant plexiglass window with a wide view. Each seat is equipped with a headset, which can be adjusted to listen to explanations in English, Japanese, Chinese and Korean. As the submarine gradually descends to 70-100 feet (about 20-30 meters), the beauty of Hawaii's seabed can be seen through the submarine's highly transparent plexiglass window.