Pulau Tamang (Pulau Temang) is an easily-identified hilly island (Area:10Km²with an average elevation of 1 m above the sea) located at the SE extremityof Teluk Batahan, about 1 mile from the coast.
It is fringed by areef except at its W end, where there is a depth of 11m about0.1 mile offshore.
A light is shown on the W end of PulauTamang.
A shoal, with a depth of 11.9m, lies 0.75 mile W of the W extremity of Pulau Tamang.
There is good anchorage, in depths of 16.5 to 18.3m, soft clay, between the island and the mainland, with the N point of the island bearing about 315° and Ujung Palimbungan bearing S.
From Pulau Tamang, the coast is indented by a bight and trends S for 6 miles to Udjang Iban, which is rocky.