Forum:KB:AT DP

Is the AT DP head pressurized because I am pretty sure it was operating in space in the honourable ones http://starwars.wikia.com/wiki/The_Honorable_Ones they seemed outside of the pressurized hanger, are the slits in a atdp glass or something else? Its shown here at time 2:38 https://www.youtube.com/watch?v=CJ2oBbI5J9w