Lewthwaite Strait () is a passage wide, lying between Coronation Island and Powell Island in the

South Orkney Islands The South Orkney Islands are a group of islands in the Southern Ocean, about north-east of the tip of the Antarctic PeninsulaGeorge Powell, a British sealer in the sloop ''Dove'', and Captain Nathaniel Palmer, an American sealer in the sloop ''James Monroe''. Mr. Lewthwaite was a teacher of navigation in Prince's Street, Rotherhithe, London; Captain Powell left the chart and journal of his Antarctic exploration with Lewthwaite before sailing on his last expedition, on which he met his death.

References

Straits of Antarctica Landforms of the South Orkney Islands {{SouthOrkneys-geo-stub