| South Jason | |
| Type: | Island |
| Native Name: | Islas las Llaves |
| Native Name Lang: | es |
| Pushpin Map Caption: | South Jason shown within the Falkland Islands |
| Coordinates: | -51.204°N -60.883°W |
| Subdivision Type: | Country |
| Subdivision Name: | Falkland Islands |
| Subdivision Type1: | Island group |
| Subdivision Name1: | Jason Islands |
| Seat Type: | Main settlement |
| Area Total Km2: | 3.75 |
| Population As Of: | 2001 |
| Population Density Km2: | auto |
| Timezone1: | FKST |
| Utc Offset1: | −3 |
| Footnotes: | If shown, area and population ranks are for all islands and all inhabited islands in the Falklands respectively. |
South Jason is one of the Jason Islands in the north west Falkland Islands.[1] In Spanish it is considered one of"Islas las Llaves" (eastern, Seal Rocks and North Fur Island).[2] Such a distinction doesn't exist in English between the two groups of the islands.
It is north west of Westpoint Island.
During the Falklands War, two Argentine McDonnell Douglas A-4C Skyhawks crashed on the island on 9 May 1982[3] - both of the pilots - Lt Jorge Casco and Lt Farias - were killed. C313 (Lt Casco's Aircraft) was filmed just before this loss during mid-air refuelling. On 12 January 2001 an EOD team visited the island to dispose of any live ordnance that had become apparent since their last annual visit.
The remains of Lt Casco were not found until after the war at . He was buried on 7 March 2009[4] in the Argentine Military Cemetery on East Falkland. Casco's family requested that his remains be buried on the Falklands, even after they had been returned to Argentina in July 2008 for DNA testing in order to confirm their identity.