The first waterjet propelled Patrol Gunboat Hydrofoil "Tucumcari" (PGH-2) was built for operation by the Navy at a cost of $4 million by a Boeing subcontractor in Tacoma, Washington, and then assembled and outfitted at a Boeing facility in Seattle. Boeing's previous US Navy operated hydrofoil was the Patrol Craft Hydrofoil , which utilized two forward hydrofoils and propellers on an aft-mounted single foil. Before that, Boeing had built and operated several hydroplane and hydrofoil test craft for itself and for the Navy.