The EMD SW7 is a type of diesel-electric switcher locomotive built by Electro-Motive Division (EMD) from 1950 to 1953. It features a 1,500 horsepower engine and is designed for switching duties in rail yards and industrial areas. The SW7 is known for its reliability and versatility, making it a popular choice among railroads. With a length of approximately 56 feet, the SW7 can navigate tight spaces and perform various tasks, such as moving freight cars and assembling trains. Over 1,200 units were produced, and many remain in service today, showcasing the enduring legacy of this locomotive model in the rail industry.