Pulau Tiga National Park | Pulau Serangoon | Pulau Gaya | Pulau Bunting | Pulau Besar |
The areas of the Group Representation Constituency consists of East Coast, Bedok, Changi-Simei, Fengshan, Siglap, Kampong Chai Chee and offshore islands of Pulau Tekong, Coney Island and Pulau Ubin.
The gun battery positions on Pulau Sejahat could have been intended to protect the stretch of waters between Changi and Pulau Tekong, so as to extend the coverage provided by the neighbouring coastal defence batteries.