A shoal with a depth of 16.3m, lies 3.5 miles WSW of Pulau Batu Besar.
Two white towers, each about 34m high, stand about 2 miles ENE of Pulau Batu Besar.
There is no safe passage for vessels without local knowledge between Pulau Batu Besar and the mainland as the area is fouled by rocks, some above-water.
The sea is discolored by rips, which do not necessarily coincide with the shoals.
A rocky shoal, with a depth of 3.4m, lies almost 1 mile E of Pulau Batu Besar.