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
Tiparra Reef Tiparra Reef Tiparra Reef (also spell as Tipara) is a reef located in Spencer Gulf in South Australia about west of the town of Port Hughes. The reef is described as being "a bank of sand, in extent, with depths of less than , that lies in the middle of Tiparra Bay" with a"limestone ledge, long in a N[orth] S[outh] direction and about wide, that just dries, lies on the S[outh] W[est] end of the reef N[orth] W[est] of Cape Elizabeth" (which is the southern headland of Tiparra Bay). The limestone ledge was the site of an operational lighthouse from