The term Territorial Sea Baseline refers to the line from which the seaward limits of New Zealand's maritime zones are measured. The breadth of the territorial sea, the seaward limits of the contiguous zone, the exclusive economic zone and, in some cases, the continental shelf, are measured from the Territorial Sea Baseline. For more information on Maritime Boundary Definitions see: http://www.linz.govt.nz/sea/nautical-information/maritime-boundaries/maritime-boundary-definitions

New Zealand's extended continental shelf line defined by the United Nations Law of the Sea Submission Article 76