Matthew Flinders named it Investigator’s Strait on March 29, 1802.:256
Location
Investigator Strait is north of Kangaroo Island and south of Yorke Peninsula. Flinders said its borders were Gulf St Vincent and Backstairs Passage. The border with Gulf St Vincent is a line from Troubridge Point on Yorke Peninsula to Cape Jervis on Fleurieu Peninsula. The border with Backstairs Passage is from Cape Jervis to Kangaroo Head on Kangaroo Island. Flinders said Backstairs Passage is a different water area from Investigator Strait. The border between Investigator Strait and Nepean Bay on Kangaroo Island is between Point Marsden and Kangaroo Head. The western border of the strait is from Cape Spencer on Yorke Peninsula to Cape Borda on Kangaroo Island.
Protected areas
There are many protected parks and reserves in and near Investigator Strait:
12Hydrographic Department, Ministry of Defence (1983). Gulf of St Vincent and approaches (chart no. 1762). – reproduced by the Royal Australian Navy Hydrographic Service
1234Bye, J.A.T. (1976): Physical oceanography of Gulf St Vincent and Investigator Strait. In: Twidale, C.R., Tyler, M.J. & Webb, B.P. (Eds.), Natural history of the Adelaide Region. Royal Society of SA Inc, Adelaide. pp. 143.
↑Flinders, Matthew (1966) [1814]. A Voyage to Terra Australis: Undertaken for the Purpose of Completing the Discovery of that Vast Country, and Prosecuted in the Years 1801, 1802, and 1803, in His Majesty's Ship the Investigator. Adelaide: Libraries Board of South Australia. LCCN66070225. OCLC4565366. OL38607138M. WikidataQ133875246.