Factual error: They repeatedly say how equipment will freeze in moments, but they leave their faces exposed and coats open, hoods off at times. In such cold temps, the skin would freeze in minutes.
Factual error: Walter gives the volume of additional air/oxygen from the tank as "298 cubic liters", it is either cubic ft, cubic meters or simply liters, not cubic liters. (00:32:35)
Factual error: One of the characters is playing an Octave Cat. He plays chords, along with a bass line. This is impossible: The Octave Cat is a duo-phonic instrument and can only play two notes simultaneously. (00:35:45 - 00:36:40)
Answer: A propeller sucks in from one side and pushes away from the other side.