As Bower and Payton adventure through the Elysium, they slowly reveal the clues that ultimately lead to the realization that
they have been underwater the entire length of the film.
I understand that the ship was designed for hypersleep and the computer system wasn't helpful in determining their location, but we do know for sure that the crew ejection systems functioned perfectly, so there was at least one way to exit/escape the ship. You would think there would also be windows available for crew members and passengers to look at the stars upon awakening
(unless it was designed to release only upon arrival, which leaves me with another question as to why that didn't happen when they arrived on Tanis in the first place).