Question: In which Navy was the single-engine BAE Systems Hawk operated?

Passages:
Maritime Services was originally formed as Fleet Support Limted (FSL), a joint venture between Vosper Thornycroft (now VT Group) and GEC-Marconi.  GEC's 50% share passed to its successor BAE Systems in 1999.  In July 2008 BAE Systems and VT Group merged their military shipbuilding businesses to form BVT Surface Fleet.  In 2009 this became BAE Systems Surface Ships, with complete ownership passing to BAE Systems and the company being renamed BAE Systems Surface Ships Support Limited.  In January 2012, BAE Systems Surface Ships Support was restructured, joining with parts of BAE Systems Insyte to become BAE Systems Maritime – Maritime Services. BAE Systems AB is a Swedish defence company and a subsidiary of BAE Systems Land and Armaments, whose ultimate parent is the British defence contractor BAE Systems.  The company is a holding company for Land Systems Hägglunds AB and BAE Systems Bofors AB, and has no products of its own. BAE Systems Land & Armaments is a wholly owned subsidiary of BAE Systems Plc.  and is responsible for the design, development and production of combat vehicles, ammunition, artillery systems, naval guns and missile launchers.  It is the largest such company in the world.  It was created on 24 June 2005, following the completion of BAE Systems' acquisition of United Defense in 2004 and its merger with BAE Systems Land Systems.  In 2007 BAE Systems acquired Armor Holdings adding to the size of Land & Armaments significantly. BAE Systems Maritime – Naval Ships is a wholly owned subsidiary company of BAE Systems plc, specialising in naval surface shipbuilding and combat systems integration.  One of three divisions of BAE Systems Maritime, along with BAE Systems Maritime – Submarines and BAE Systems Maritime – Maritime Services, it is the largest shipbuilding company in the United Kingdom, one of the largest shipbuilders in Europe, and one of the world's largest builders of complex warships. BAE Systems Inc. (formerly BAE Systems North America) is a wholly owned subsidiary of the British defence and aerospace company BAE Systems plc.  As per its Special Security Agreement, BAE Systems Inc. operates as a semi-autonomous business unit within BAE Systems controlled at a local level by American management. The BAE Systems Hawk is a British single-engine, jet-powered advanced trainer aircraft.  It was first flown at Dunsfold, Surrey, in 1974 as the Hawker Siddeley Hawk, and subsequently produced by its successor companies, British Aerospace and BAE Systems, respectively.  It has been used in a training capacity and as a low-cost combat aircraft. The McDonnell Douglas (now Boeing) T-45 Goshawk is a highly modified version of the British BAE Systems Hawk land-based training jet aircraft.  Manufactured by McDonnell Douglas (now Boeing) and British Aerospace (now BAE Systems), the T-45 is used by the United States Navy as an aircraft carrier-capable trainer. The Fleet Requirements and Air Direction Unit (FRADU) was a unit of the Royal Navy's Fleet Air Arm operated by the contractor Serco Defence and Aerospace.  It was established in 1972.  It was most recently equipped with 13 BAE Systems Hawk T1 advanced jet trainer aircraft on lease to the Royal Navy from the Royal Air Force, based at RNAS Culdrose in Cornwall.  Two of these aircraft were permanently detached to Naval Flying Standards Flight (fixed wing) at RNAS Yeovilton where they are flown by RN pilots, but maintained by Serco engineers. BAE Systems Southeast Shipyards is a division of BAE Systems Ship Repair, which itself is a subsidiary of BAE Systems Inc., the North American arm of British defense conglomerate BAE Systems.  It was formed through the acquisition of Atlantic Marine from the J.F. Lehman and Company private equity firm in May 2010 for $352 million. Atlantic Marine was an American shipbuilding and construction company.  It operated two shipyards, one in Mobile, Alabama and the original corporate location, a smaller one in Jacksonville, Florida where its headquarters was located.  It was acquired by BAE Systems in May 2010 for $352 million.  BAE Systems renamed the former company BAE Systems Southeast Shipyards, a division of BAE Systems Inc.

Supporting sentences:
The Fleet Requirements and Air Direction Unit (FRADU) was a unit of the Royal Navy's Fleet Air Arm operated by the contractor Serco Defence and Aerospace.  It was most recently equipped with 13 BAE Systems Hawk T1 advanced jet trainer aircraft on lease to the Royal Navy from the Royal Air Force, based at RNAS Culdrose in Cornwall. The BAE Systems Hawk is a British single-engine, jet-powered advanced trainer aircraft.