ga.gov.au: Maritime Boundary Definitions

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A nautical mile (M) is a unit of distance equal to 1 852 metres. This value was adopted by the International Hydrographic Conference in 1929 and has subsequently been adopted by the International Bureau of Weights and Measures.

The length of the nautical mile is very close to the mean value of the length of 1 minute of latitude, which varies from approximately 1 843 metres at the equator to 1 861.6 metres at the pole.

Maritime zone definitions


Maritime features, limits and zones


Australia's Maritime Zones Map


http://www.ga.gov.au/marine/jurisdiction/maritime-boundary-definitions.html

Map of Australia's Maritime Zones [PDF 1.4MB]
https://www.ga.gov.au//products/servlet/controller?event=GEOCAT_DETAILS&catno=63690