Gosong Bunga (Bunga Banks) (3°45'N., 99°03'E.), which lie near the SE end of Gosong Deli consists of two detached parallel sandy ridges, lying between 6 and 9 miles NE of Tanjung Si Bunga. The outer ridge has a least depth of 1.5m, mud, sand, and shells and is steep-to on its outer side. The inner ridge has a least depth 2m.
Both ridges are usually marked by tide rips over their shallowest parts and with any swell the sea breaks. Between the inner ridge and the coastal bank, tide rips and discoloration of the water are frequently observed.