Socotra Rock

Socotra Rock, also known as Ieodo (Korean: 이어도), Parangdo (파랑도), or Suyan Islet (simplified Chinese: 苏岩礁; traditional Chinese: 蘇巖礁; pinyin: Sūyán Jiāo), is a submerged rock 4.6 metres (15 ft) below sea level (at low tide) located in the Yellow Sea. International maritime law stipulates that a submerged rock outside of a country's territorial sea (generally 12 nautical miles) cannot be claimed as territory by any country. However, the rock is the subject of a maritime dispute between China and South Korea, which consider it to lie within their respective exclusive economic zones. The rock is located 149 kilometres (80 nmi; 93 mi) southwest of Marado (just off Jeju Island) in Korea. Yushan Island of Zhejiang, China, is 287 km (155 nmi; 178 mi) away from the rock. The rock serves as the foundation for Korean Ieodo Ocean Research Station. A Korean helipad is also located there to allow the research station to be serviced.