琼台礁位于潭门礁西南2.5海里处。在北纬4度59分,东经112度37分,实为暗礁。1983年公布琼台礁为标准名称。潭门礁位于南康暗沙北部居中。北距北康暗沙约14海里。东北——西南长约2海里。最浅处水深约4.9米。 Qiongtai reef is located 2.5 nm southwest of Tanmen Reef. At 59 degrees north latitude and 112 degrees 37 minutes east longitude, it is a reef. 1983 known as Taiwan Reef as the standard name. Tanmen Reef is located in the north of Nankang dark sand in the middle. Beicang Beikang dark sand about 14 nautical miles. Northeast - Southwest about 2 nautical miles. The shallowest depth of about 4.9 meters.