The unofficial flag of the Chatham Islands (Wharekauri in Māori; Rēkohu in the indigenous Moriori language) is a blue field with a map of the island in the centre, the Te Whanga Lagoon depicted in white.

[1] Behind this device map is a depiction of the rising sun, an allusion to its local name Rēkohu, meaning 'rising sun'.

The flag was designed in 1989 by Logan Alderson, a former New Zealand police officer.

[2] At the 2005 opening of a new marae on the islands (which included a rare visit by the Prime Minister), the Chathams flag was flown on a flagpole over the marae.

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