Yim Tin Tsai
Kau Sai Chau is located south of the Sai Kung Peninsula. Its northern shore forms part of the southern limit of Port Shelter Sheltered Water, of which it is the largest island. Kau Sai Chau is connected in the north by a breakwater to the smaller island Yim Tin Tsai. The southern tip of the island is separated by a narrow channel from Jin Island. It has a maximum elevation of 216 m.