VH-3D SeaKing Marine One helicopter model. The Sikorsky Marine-1 is a VH-3D. The VH-3D is a twin engine, all-weather helicopter flown by Marine Helicopter Squadron One (HMX-1) and supports the executive transport mission for the President of the United States.
The VH-3D has been in use for approximately 25 years and is the helicopter transport for the President of the United States, Vice President, and other visiting heads of state. It has seating provisions for 16 passengers and the aircrew consists of a pilot, co-pilot, and crewchief. Designed as an executive transport, the aircraft systems, interior furnishings, and equipment have been optimized for executive transport missions. The VH-3D receives extensive care and maintenance exceeding normal standards to keep the aircraft in superior condition. The VH-3D incorporates a folding pylon for loading and storage onto an Air Force C-5A/B and C-17 transport for overseas assignments.