Pulau Rangas, lying about 2 miles SW of Ujung Baro, is a small rocky island 66m high, and covered with trees, which are visible for a considerable distance.
Two rocks above-water lie off its SE side, and a sunken rock, which always breaks, lies 91m off its NW side, all of which are steepto.
A rock, 0.9m high, lies ESE, 0.4 mile from Pulau Rangas.

There is fine weather anchorage all around the island, in a depth of about 21.9m; small vessels may find shelter during NW winds in the same depth, with the NE extremity of the island bearing 278°, distant about 183m.