Nauru's Territorial Sea Baseline was defined using the 1993 topographic map produce by Survey Graphics Pty Ltd of Perth, Western Australia, under the direction of the Ministry of Island Development and Industry. The map is based on UTM Grid Zone 58, which is referred to the World Geodetic System 1972 (WGS 72). The WGS 72 coordinate system was then converted to WGS 84 using transformation parameters tabled on Nauru Maritime Boundaries Technical Report (TR 399).
Niue's Territorial Sea Baseline was derived using the IKONOS satellite imagery taken in 2004 and Horizontal Datum used was the World Geodetic Datum 1984 (WGS 84) as stipulated under Section 12 of the Maritime Zones Act 2013.
The Marine Zones (Declaration) Act 2011 repeals the Marine Zones (Declaration) Act 1983. It states that the territorial sea of Kiribati comprises those waters having, as their inner limits, the baseline of Kiribati and, as their outer limits, a line measured seaward from that baseline, every point of which is at a distance of twelve (12) nautical miles from the nearest point of the baseline.
The Territorial Sea Baseline of Cook Islands was derived from two high resolution satellite imageries called Geo-eye and WorldView -2 in 2011 and 2012. These imageries are referenced to the World Geodetic System 1984 (WGS 1984) datum. The baselines were defined and completed by Cook Islands technical team in collaboration with SPC in 2005.
The Marine Zones (Declaration) Act 2011 states that "Baseline" means the baseline from which the breadth of the territorial sea, contiguous zone, exclusive economic zone and continental shelf is measured. It contains the geographic coordinates that defines the baseline for the Line Group. The points are defined by geographic coordinates are determined by reference
to the World Geodetic System 1984 (WGS 84).