Latitude: 60°43'´S, Longitude: 045°38'´W
4 miles long and less than 3 miles wide, lying to the south of the middle of
Coronation Island, in the South Orkney Islands.
Unnamed at the time, the appearance of
the island was roughly plotted on James Weddell's chart of 1825.
Petter Sørlle, in the Norwegian whale-catcher Paal made a
running survey of the island in the 1912-13 season. The island was named after Captain Sørlle's
wife, Signy Sørlle.
The island was surveyed in 1933 by
the Discovery II and by the FIDS in the period 1947-50.
base with Coronation Island in the background during summer. Two
Humber inflatable and the launch "Serolis" (named after
a local marine arthropod) can be seen in the sea just off shore.