Batu Betata, a small islet, lies on the coastal reef about 2 miles W of Pasop Reef.
There is a passage on either side of Karang Galang.
On the W side between the reef and the coast of Pulau Batam, although not so wide as the E or main passage, has general depths of 11 to 14.6m.
Vessels with a draft of less than 7.9m can safely use this passage by day. Native pilots seldom use the E passage, where the depths are much greater.