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 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?