A dependent territory of New Zealand, Tokelau is one of the most remote nations in the world. Tokelau is located approximately 500 kilometres to the north of Samoa - it consists of three tropical coral atolls - Atafu, Nukunonu and Fakaofo - and has no port facilities or airfields. The only way to reach the islands is by transfer from ships to small barges that navigate through narrow channels cut into the coral reefs. Transfers are highly subject to weather and can be dangerous because of the waves that break into the channels, causing choppy conditions and unpredictable currents.