Abstract:The territorial sea baseline is the line from which the seaward limits of Australia’s maritime zones are measured.  These limits include the breadth of the territorial sea, the seaward limit of the contiguous zone, exclusive economic zone and, in some cases, the continental shelf. The territorial sea baseline also constitutes the inner limit of the territorial sea of Australia, waters on the landward side of the baseline are internal waters of Australia for the purposes of international law.  The territorial sea baseline does not represent the constitutional limits of Australia’s States or Territories.The territorial sea baseline is composed of both normal and straight baselines.  This dataset depicts the Straight Territorial Sea Baselines of Australia as proclaimed in the Seas and Submerged Lands (Territorial Sea Baseline) Proclamation 2016.  This proclamation declares defined geographic coordinates for Australia’s straight baselines where, according to the principles set out in articles 7, 9 and 10 of UNCLOS, straight baselines have been drawn across the mouths of certain bays and rivers, and between the mainland and adjacent islands in some circumstances. This version release is the Australian Maritime Boundaries (AMB) 2020 and is a component of the Seas and Submerged Lands Act (SSLA) 1973.© Commonwealth of Australia (Geoscience Australia) 2021.Downloads and Links:Web ServicesSeas and Submerged Lands Act 1973 MapServer Seas and Submerged Lands Act 1973 WMTSSeas and Submerged Lands Act 1973 WMSSeas and Submerged Lands Act 1973 WFSDownloads available from the expanded catalogue link, belowMetadata URL:https://pid.geoscience.gov.au/dataset/ga/144571