The Raytheon Sentinel is a Bombardier Global Express modified as an airborne battlefield and ground surveillance platform for the British Royal Air Force. Originally known as the ASTOR (Airborne STand-Off Radar) programme the aircraft is operated by a RAF squadron manned by both air force and army personnel. The Sentinel is interoperable with other allied systems such as JSTARS and the NATO Alliance Ground Surveillance (AGS) system.
The UK government's Strategic Defence and Security Review announced its intention to "withdraw the Sentinel airborne ground surveillance aircraft once it is no longer required to support operations in Afghanistan." Sentinel has supported the British Army in Afghanistan and its role above Libya in 2011 was described as "pivotal" by the head of the RAF. In February 2012 it was announced that Sentinel would be offered as the UK contribution to NATO's Alliance Ground Surveillance (AGS) collaboration, complementing NATO RQ-4 Global Hawks and French Heron TPs.
Read more about Raytheon Sentinel: Design and Development, Specifications
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“It is a noble land that God has given us: a land that can feed and clothe the world; a land whose coastlines would enclose half the countries of Europe; a land set like a sentinel between the two imperial oceans of the globe.”
—Albert J. Beveridge (1862–1927)