The keys are a mission item for the Helicopter escape route and are needed to unlock the door.
The game requires that the door be open before the refueling process can begin.
They can be found anywhere on desks, shelves or the floors but are often found on the bridge (deck 8), the security room (deck 7 or 8), or the room with broken furniture and junk scattered around. They can also be located in the bathroom sink (deck 7).
It's possible for keys to spawn in filing cabinets (decks 5-8). Keys cannot spawn in the randomly generated filing cabinet in the spawn room.
- Due to their size, keys can be difficult to spot, the player should keep a sharp eye out for them when wandering around decks 5-8.