South Reef South Reef is a rock located in the Spratly Islands. Vietnam first took possession of the feature in 1988. U.S. Board of Geographic Names: South ReefChina: Nailuo Jiao, 奈罗礁Vietnam: Đá Nam Occupied by: VietnamLegal Status: RockGPS: 11° 23' 15” N, 114° 17' 54" E Overview Image May 11, 2024 September 8, 2020 December 1, 2017