Johnson South Reef Johnson South Reef Johnson South Reef (; ), also known as Chigua Reef in China, Gạc Ma Reef in Vietnam and Mabini Reef in the Philippines is a reef in the southwest portion of the Union Banks in the Spratly Islands of the South China Sea. It is controlled by the People's Republic of China (PRC), but its ownership is disputed by the PRC, the Philippines, Taiwan, and Vietnam. Johnson South Reef lies adjacent to the Vietnamese-controlled Collins Reef (also known as Johnson North Reef) which lies to the northwest. It is naturally above water only at low tide. Prior
Apo Island dive center: Apo Island Beach Resort and Liberty's Lodge. There is also a ranger station and a lighthouse. The island is under the jurisdiction of the municipality of Dauin, Negros Oriental, and is one of the municipality's 23 barangays. As of the 2010 census, the island has a population of 918. Apo Island is located off the southeastern tip of Negros Island, 7 kilometers from the town of Zamboanguita, and 25 kilometers south of the Negros Oriental capital Dumaguete. Extending approximately 1.5 km (0.9 mi) from north to south and 1 km (0.6 mi) from east to west, the island