Pulau Titapan, the SW island and most conspicuous of the group, is rocky on its N and S sides and has two hills; the N hill is sharp and 108m high.
A 5.5m patch, which is steep-to, lies about 0.4 mile SW of Titapan.
Pulau Benan, 3.5 miles NW of Pulau Mesanak, is the easternmmost island of a group which separates Selat Merodong and Selat Pengelap. It is 2 miles long, tapering at both ends, and is 0.75 mile wide near the middle. The island is easily recognized by a conspicuous hill, it is 67m high, at its SE end.
A reef fronts the greater part of Benan, extending from 0.25 to 0.5 mile off the N and NE sides.
Pulau Katanglingga, l.5 miles NW of Benan, is a bold bluff-looking island 1 mile long and 50m high at the N end; the S end is low. A reef fronts the greater part of it, extending in some places to a distance of about 0.2 mile.
With onshore winds, a heavy sea runs up on the E side of Benan and Pulau Katanglingga.
Pulau Benan and Katanglingga form the E limit of the group.