The USS Midway’s Engine Room #3 was part of the immense engineering plant that provided the power needed to propel the massive aircraft carrier across the world’s oceans. Deep within the ship, engineers and machinist’s mates worked in a hot, noisy, and demanding environment, operating and monitoring the steam-powered machinery that drove the Midway’s propeller shafts. Boilers produced high-pressure steam that powered the ship’s turbines, while an intricate network of pumps, valves, gauges, pipes, and auxiliary equipment kept the propulsion system operating safely and efficiently. Engineering crews stood watch around the clock, constantly checking temperatures, pressures, lubrication, and machinery performance while remaining prepared to respond immediately to equipment failures or emergencies. Engine Room #3 offers a fascinating look at the powerful machinery and skilled sailors working far below the flight deck who helped keep the USS Midway underway during nearly 47 years of naval service.