In a ship, an engine room is where the main engine(s), generators, compressors, pumps, fuel/lubrication oil purifiers an other major machinery are located. It is sometimes referred to as the "machinery space". Engine Rooms are typically towards the stern, or rear, of the boat from the crews living accommodations. On modern ships, a sound-proofed, air-conditioned engine control room (ECR) is situated next to the engine room (ER), for the ship's machinery control systems.