Ex-"Grafton" was delivered to Chilean Navy on 28 March 2007 at Portsmouth and renamed "Almirante Lynch" (FF-07). Ex-"Marlborough" was delivered to Chilean Navy on 28 May 2008 at Portsmouth and renamed "Almirante Condell" (FF-06). The five oldest ships in Royal Navy service are classified as General Purpose ships, and are primarily homeported at Portsmouth. The remainder are equipped with the Type 2087 Towed Array Sonar, and are primarily tasked with the anti-submarine warfare mission. These eight ships are based primarily at Devonport. The remaining Type 23 ships in the Royal Navy are due to be replaced in service by the Type 26 ASW and Type 31 general purpose frigates. The oldest remaining Type 23, , is due to be decommissioned in 2023, with approximately one ship per year decommissioned after that.