Resolution Island or Tau Moana is the largest island in the Fiordland region of southwest New Zealand, covering a total of 208 km². It is the country's seventh largest island, and the second largest uninhabited island. Resolution Island is separated from the mainland of the South Island by Tamatea / Dusky Sound, Te Puaitaha / Breaksea Sound, a…Resolution Island or Tau Moana is the largest island in the Fiordland region of southwest New Zealand, covering a total of 208 km². It is the country's seventh largest island, and the second largest uninhabited island. Resolution Island is separated from the mainland of the South Island by Tamatea / Dusky Sound, Te Puaitaha / Breaksea Sound, and Acheron Passage. The island is part of the Fiordland National Park.