The flag of Tristan da Cunha was adopted on October 20, 2002, in a proclamation made by the Governor of Saint Helena under a Royal Warrant granted by Queen Elizabeth II. Prior to this, as a dependency of Saint Helena, Tristan da Cunha used the flag of Saint Helena for official purposes.
Tristan da Cunha, is a remote group of volcanic islands in the south Atlantic Ocean. It is the most remote inhabited archipelago in the world, lying approximately 2,787 km off the coast of Cape Town in South Africa, 2,437 km from Saint Helena and 4,002 km off the coast of the Falkland Islands. Tristan da Cunha is a British Overseas Territory with its own constitution. There is no airstrip on the main island; the only way of travelling in and out of Tristan is by boat, a six-day trip from South Africa.
Alternative Flag:
The Administrator of Tristan da Cunha flag consists of a Union Flag with the coat of arms of Tristan da Cunha.