Vault
Purpose?
The vault is a high-security storage that hides loads of money, internals, a nuke, and some Security records! It's located in the port (west) wing of the station. Only the Captain and Head of Personnel have access, even though the door starts bolted. It's a safe spot to hide if you want to be a coward. Just remember it can be vented and you can suffocate if the AI is turned.
Roboticists and the Research Director both want to get in for the gold inside, and the Death squad may want to activate the 'disarmed' nuke inside in case of emergency.
During Blob, the nuke is also used to achieve a neutral victory if the blob grows too large.
Other than that, it's a favourite hive for Aliens