Northruup Grumman's Global Hawk wing and profile at the Farnborough Airshow. The Northrop Grumman (formerly Ryan Aeronautical) RQ-4 Global Hawk (known as Tier II+ during development) is a Remotely Piloted Aircraft (RPA) used by the United States Air Force and Navy as a surveillance aircraft. This type of airplane now falls under the larger heading of Unmanned Aerial Vehicles, or UAVs.
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