Scarce hydrographic chart of the South Australian coast extending from Cape Catastrophe to The Great Australian Bight Surveyed by Staff Commr. F.Howard R.N., assisted by Navg. Lieut. W.N.Goalen, Navg. Sub-Lieutts. H.Roxby & A.Leeper R.N.1873-9.
With insets of Fowlers Bay Port Eyre, Denial and Smoky Bays, Streaky Bay, Waterloo Bay, Coffin Bay and Venus Bay, and two land profiles of Flinders Island and Waldgrave Island. First issued in 1875, this map has small corrections up to 1940.
The regular updating of Hydrographic charts by the Hydrographic Office was to ensure that commanders of ships, pilots and other mariners were able to have the most to up to date information available to safely navigate foreign waters and ports as new information of changes to sea depths, sand bars, wrecks or other any other pertinent nautical information that could hinder passage became available. As updated charts were offered for sale, the earlier outdated charts in the hands of mariners, pilots, ships owners and sailors were invariably discarded, subsequently making all British Admiralty issued hydrographic charts of the period rare.