The Fiber Optic Austral (FOA) is the southernmost submarine cable in the world, connecting Las Lagos, Aysén and Magallanes in southern Chile.

The FOA cable system has a design capacity of 16 Tb/s and a length of 2,800 kilometers. It is expected to be completed by the end of 2019.

The FOA cable system is owned and operated by CTR (Comunicación y Telefonía Rural S.A.), and supplied by Huawei Marine.