Yes. George Bass, together with Matthew Flinders, proved that Tasmania (then Van Diemen's Land) was an island, and not connected to the Australian mainland. Because it was his initiative that led to the expedition being organised, the strait of water Bass and Flinders discovered between the mainland and Tasmania bears the name of Bass Strait.
In 1795, not long after their arrival in Sydney, Bass and Flinders set out in Bass' small boat the Tom Thumb to explore the Georges River (which empties into Botany Bay.)
Matthew Flinders's first seafaring expedition was when he accompanied William Bligh on his second voyage to Tahiti in 1791. He was 17 at the time, and had only been in the Royal Navy for 2 years. His first journey for the purposes of exploration was in 1796 when, accompanied by George Bass, Flinders first explored Botany Bay and the coastline south of Sydney in an 8-foot open boat, the Tom Thumb.
Matthew Flinders's most famous expedition was his circumnavigation of Australia. Between 1802 and 1803, Flinders circumnavigated and charted the entire Australian continent.
George Bass and Matthew Flinders did not just travel south to Van Diemen's land: they circumnavigated the island. Bass, in particular, theorised that Van Diemen's land was an island, and he and Flinders sought to prove this.
Matthew Flinders circumnavigated Tasmania with George Bass.
Together with George Bass, Matthew Flinders completed much sea exploration around Australia, adding to the knowledge of the coastline, and producing accurate maps. Flinders, together with Bass, was the first to prove that Van Diemen's Land, or Tasmania, was an island and not connected to the mainland. Flinders was also the first to circumnavigate the continent, and between December 1801 and June 1803, he charted most of the coastline of Australia.
Flinders Island is one.
Matthew Flinders and George Bass circumnavigated Van Diemen's Land (now Tasmania) in 1798, thus proving it was an island.
Matthew Flinders and George Bass sailed across the top of Tasmania
William Martin
They both were born in Chile