The Kokos Islands are two low islands, lying about 24 miles W of the N extremity of Pulau Simeulue.
They may be seen from a distance of about 13 miles. The southernmost island is marked by a light.
Depths of from 9 to 16.5m exist on the NW end of the bank extending 19 miles out from the W extremity of Pulau Simeulue.
These patches are usually marked by heavy rollers.