Diego Garcia is to the equator's south.
Diego Garcia is an island of the British Indian Ocean Territory, an overseas territory of the United Kingdom
=== Fresh water supply ===Diego Garcia is the above-water rim of a coral atoll composed of Holocene coral rubble and sand to the depth of about 36 m (118 ft), overlaying Pleistocene limestone deposited at the then-sea level on top of a seamount rising about 1,800 m (5,900 ft) from the floor of the Indian Ocean

