- This 4" X 6" print of a United States Marine Corps Boeing Vertol CH-46 Sea Knight helicopter has a military gray frame that measures 6.5" X 8.5". The Sea Knight was operated by the USMC as an all-weather, day-night assault helicopter. It was used to transport troops, supplies and equipment. The frame comes with a drywall screw for mounting on a wall and a dowel for displaying on a shelf or desk. Handmade in the USA by a Vietnam veteran owned company, it is a unique item for all aviation enthusiasts to display.