During February 2010, "Wave Ruler" and the destroyer were deployed to the Falkland Islands during a period of increased tension between the United Kingdom and Argentina over the former's plans to begin drilling for oil in the seas surrounding the islands. While in the South Atlantic, "Wave Ruler" took part in the rescue of an I-Kiribati sailor who was taken seriously ill, refuelling an RAF 1564 Search and Rescue Flight Sea King helicopter while in flight. The deployment also saw the ships visit Southern Thule in the Southern Sandwich Islands, the first British warships to visit the islands for nearly 10 years. November 2010 saw the vessel back in the Caribbean, where she distributed of fresh water and 32,000 water purification tablets in St Lucia after the effects of Hurricane Tomas. The deployment also saw the vessel visit Antigua and the British Overseas Territory of Grand Cayman.