Doors serve as obstacles for enemies and allow the player to control which rooms their drones and the enemies have access to (with a few exceptions).
Doors can be destroyed by enemies (definitely Drone Swarms, possibly others too). After being destroyed, doors will turn red, are stuck open and cannot be closed.
Without actually having discovered the doors, the player will see all doors as weak ones.
Doors can also randomly stop responding, after which, you will be unable to operate them. Beware that doors (especially weaker ones) may eventually be damaged or even destroyed when being connected to rooms that are vented to space.
Sometimes the derelict can stop responding to the 'close' command and you will be unable to close any doors.
In Drone View doors will be green if powered, blue if unpowered and red if damaged or destroyed. Yellow doors are airlocks, and will remain that colour unless destroyed.
Note that all doors are numbered after all the airlocks (if you docked at 'A1' are looking for another airlock, but come across a door marked 'D2', there won't be any other airlocks on the derelict. If, for example, you were in the same situation, but came across a door marked 'D8', you could conclude until further notice that there are AT MOST 6 other airlocks on the ship).
You can control the doors with the following Commands:
|Command||Effect if closed||Effect if open|
|open d1||Opens||No effect|
|close d1||No effect||Closes|
Here d1 should be replaced with whatever door(s)/airlock(s) you want to open or close.