Investigator Strait is bounded by Yorke Peninsula to its north and by Kangaroo Island to its south. Flinders identified its boundaries with the following adjoining bodies of water - Gulf St Vincent and Backstairs Passage. The Strait’s boundary with Gulf St Vincent is the line from Troubridge Point on Yorke Peninsula to Cape Jervis on Fleurieu Peninsula. Its boundary with Backstairs Passage is the line from Cape Jervis on Fleurieu Peninsula to Kangaroo Head (west of Penneshaw) on Kangaroo Island. Flinders noted that Backstairs Passage is a body of water separate to Investigator Strait. The Strait’s western boundary by definition is the line from Cape Spencer on Yorke Peninsula to Cape Borda on Kangaroo Island.
^Bye, 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.
Arnott, T., (1996), Investigator Strait Maritime Heritage Trail, Heritage Branch, Department for Environment, Heritage and Aboriginal Affairs. Adelaide(ISBN 0 7308 4720 9).
Coroneos, Cosmos & McKinnon, Robert; (1997), Shipwrecks of the Investigator Strait and the Lower Yorke Peninsula, Department of Environment and Natural Resources, Adelaide, South Australia. (ISBN 0-9588496-3-3).
McKinnon, R.; (1993), Shipwreck sites of Kangaroo Island, State Heritage Branch, Department of Environment and Land Management. Adelaide (ISBN 0730826929).