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
Shark River Reef in December, resulted in the deliberate dumping of 3,600 cubic yards of dredged rock material about half of a mile north of the reef. Due to a punctured hull, the barge carrying the rock began to lean rapidly. To avoid possible sinking or flipping of the barge, the captain dumped the rock. Shark River Reef Shark River Reef is an artificial reef located in the Atlantic Ocean, 15.6 miles southeast of Manasquan Inlet, off the coast of Ocean County, New Jersey. The site contains almost 4 million cubic yards of dredge rock material. Although 96% of the total reef material