United States Department of State permitted Foreign Military Sales discussions with South Korea about Ghost. In 2014, it was reportedly offered to several nations including Bahrain, Qatar, Israel, Saudi Arabia, Japan, Taiwan, South Korea, and Singapore. High-level discussions were allegedly held with one nation interested in 25 vessels like Ghost in a potential $300 million sale. Juliet Marine also offered a scaled-up corvette-sized Ghost in length during the U.S. Navy's re-evaluation of the Littoral Combat Ship program; costing about $50 million per vessel, it is one sixth the price of the $300+ million per-ship cost of a or s. One impediment to U.S. Navy procurement of Ghost is a preference of senior leaders for large-hulled oceangoing vessels that can also perform inshore operations, instead of smaller craft specialized for inshore missions. Design Ghost uses a dual-pontoon super-cavitating hull, known as the small waterplane-area twin-hull (SWATH), to run at top speed through seas. It is gyro-stabilized; control is provided by 22 underwater control surfaces. Below eight knots, Ghost sits in the water on its centreline, - long module; faster than this, the marine aluminum buoyant hulls lifts the main hull out of the water by two - long struts, achieving full stability and reducing the amount of area resisting the water. Each strut is attached to a - long underwater tube that contains the engines. Four propellers are at the front of the tubes, which is more stable and allows for better control at high speeds; the propellers funnel air down through the struts, creating a gas bubble around each tube (the cavitation effect) for reduced drag and smooth motion. Propulsion on the prototype is provided by two T53-703 turboshaft engines providing 2,000 horsepower; there are plans to later adopt the General Electric T700 turboshaft engine. Since the tubes that contain the engines, fuel, and most computing systems are underwater, this lessens vulnerability because critical systems are protected by the water itself. The aircraft-style cockpit is outfitted with large windshields fashioned from two inch-thick glass; steering is provided via a throttle and joystick arrangement. Ghost has achieved speeds of over 30 knots, and is being tested to 50 knots. It is called Ghost in recognition of its design, which bears a marked resemblance to the Lockheed F-117 Nighthawk, making the craft virtually invisible to radar detection. It can perform several types of missions, including anti-surface warfare (ASuW), anti-submarine warfare (ASW), and