Grierson Reef Grierson Reef is a rock located in the Spratly Islands. Vietnam first took possession of the feature in 1978. U.S. Board of Geographic Names: Grierson ReefChina: Ranqing Shazhou, 染青沙洲Philippines: Julian Felipe ReefVietnam: Đảo Sinh Tồn Đông Occupied by: VietnamLegal Status: RockGPS: 9° 54' 8" N, 114° 33' 50" E Overview Images August 11, 2025 September 24, 2020 July 27, 2020 September 30, 2017 March 6, 2017 January 21, 2016 Analysis of Outpost Vietnam Builds Up its Remote Outposts Vietnam’s Island Building: Double-Standard or Drop in the Bucket?