STS Tranquility
With the security access codes, you're able to open the door. Inside, you find a standard airlock, empty.
You cycle inside, and close the outer door, then repressurize. The inner airlock door similarly unlocks.
The STS Tranquility, and you have the deck plans, is laid out with a bridge at one end, along with crew compartments. Engineering and engines are at the back. Storage, medical, recreation, maintenance and less crucial spaces are spreadout between. The thinking is that if anything goes wrong, you want to be as far away from the engines as you can.
How do you proceed?