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
Cato Reef Cato Reef Cato Reef, a part of the Cato Bank, is an area in the Coral Sea off the central coast of Queensland, Australia that is of approximately 21 km by 13 km of this 200 km area, where depth of water is typically less than 17 m. Upon Cato Bank Cato Reef encircles an area of 3.3 km by 1.8 km, area 5 km including a small shallow lagoon which contains Cato Island, a low-relief cay in the west that is approximately 650 by 300 m, area 15 hectares, 6 m high. Close to the southeast corner of Cato