The Andaman and Nicobar Islands, a Union territory of India comprising 572 islands of which 37 are inhabited, are a group of islands at the juncture of the Bay of Bengal and the Andaman Sea. The territory is about 150 km (93 mi) north of Aceh in Indonesia and separated from Thailand and Myanmar by the Andaman Sea. It comprises two island groups, the Andaman Islands (partly) and the Nicobar Islands, separated by the 150 km wide Ten Degree Channel (on the 10°N parallel), with the Andamans to the north of this latitude, and the Nicobars to the south (or by 179 km). The Andaman Sea lies to the east and the Bay of Bengal to the west. The territory’s capital is the city of Port Blair. The total land area of the islands is approximately 8,249 km2 (3,185 sq mi). The islands host the Andaman and Nicobar Command, the only tri-service geographical command of the Indian Armed Forces. The territory is divided into three districts: Nicobar District with Car Nicobar as capital, South Andaman district with Port Blair as capital and North and Middle Andaman district with Mayabunder as capital.