What is a tourist submarine?
A tourist submarine is one atmosphere undersea vessel that is designed to take passengers on underwater excursions. For this observation purposes, tourist submarines have transparent portholes for external viewing. The term “one atmosphere” means that the pressure inside the submarine never varies from sea level regardless of operating depth. Typically, dives on a tourist submarine are not more than one hour in duration and operating depths vary between 20 to 80 m.
