The CH-53 is a heavy-lift helicopter used primarily by the United States Marine Corps. It is designed to transport troops, equipment, and supplies in various environments, including combat zones. The helicopter can carry up to 55 troops or a payload of around 16,000 pounds, making it one of the largest helicopters in service. Developed by Sikorsky Aircraft, the CH-53 has several variants, including the CH-53E Super Stallion and the newer CH-53K King Stallion. These helicopters are equipped with advanced avionics and powerful engines, allowing them to operate in challenging conditions and perform long-range missions effectively.