Almirante Williams (FF-19), ex-HMS Sheffield

The Type 22 Broadsword class is a class of frigate built for the Royal Navy. Fourteen of the class were built in total, with production divided into three batches. Four Batch 3 ships remain in service with the Royal Navy. Seven ships of the earlier batches have been sold for further service with Brazil, Romania and Chile, two have been sunk as targets and the other sold for scrapping.

HMS Sheffield (F96) was a Type 22 frigate of the Royal Navy of the United Kingdom. She was originally intended to be named Bruiser but was named Sheffield in honour of the previous Sheffield (D80), a Type 42 destroyer sunk in the Falklands War.

HMS Sheffield was decommissioned on 4 November 2002. After 14 years service, which included providing humanitarian assistance to Nicaragua and Honduras after Hurricane Mitch (which earned her the Wilkinson Sword for Peace along with HMS Ocean), the Strategic Defence Review of 1998 (updated 2001) saw the end of her career.

She was sold to Chile on 4 September 2003 and renamed Almirante Williams (FF-19) in honour of Juan Williams Rebolledo. She is slated for a major refit in 2008, which will see the installation of a 76mm cannon, surface-to-surface missiles (Harpoon), and more advanced electronics. Some sources state that the Barak anti-missile system will be installed, these having been retrieved (and refurbished) from decommissioned County Class destroyers. The Barak is more advanced than the current Sea Wolf system installed on Type 22 frigates, although they both are for anti-missile defense.