Raytheon integrates Phalanx CIWS on Royal Navy HMS Duncan.

According to a tweet published by the UK Ministry of Defense on October 6, 2021, Raytheon integrates the Phalanx Close-in weapon system on Type 45 HMS Duncan of the Royal Navy.
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Installation of the Phalanx CIWS on the Type 45 destroyer HMS Duncan (Picture source: Twitter account of HMS Duncan)

HMS Duncan is the sixth and last of Type 45 or Daring-class air-defence destroyers built for the Royal Navy and launched in 2010. Duncan is named after Adam Duncan, 1st Viscount Duncan (1 July 1731 – 4 August 1804), who defeated the Dutch fleet at the Battle of Camperdown on 11 October 1797. The destroyer has served in the Mediterranean, Black, and Caribbean Seas and in 2019 was deployed to the Persian Gulf in response to increased tensions with Iran in the region.

Type 45 destroyers, also known as the Daring class, are guided-missile destroyers built for the United Kingdom's Royal Navy. The class is primarily designed for anti-aircraft and anti-missile warfare and is built around the PAAMS (Sea Viper) air-defense system utilizing the SAMPSON AESA and the S1850M long-range radars. The first three destroyers were assembled by BAE Systems Surface Fleet Solutions from partially prefabricated "blocks" built at different shipyards, the remaining three were built by BAE Systems Maritime – Naval Ships.