The Airlock of the Torrens in Aliens: Isolation.

The Airlock on Deck A of the courier ship, Torrens, in Alien: Isolation

Through the Airlock, the ship can dock to another space ship or space station to allow movement between the two vessels without depressurizing the whole ship.

Also from here, Amanda, Samuels, and Taylor embark on a space-walk to the Sevastopol Station