Southwest Cay Southwest Cay is a rock located in the Spratly Islands. Vietnam first took possession of the feature in 1975. U.S. Board of Geographic Names: Southwest CayChina: Nanzi Dao, 南子岛Philippines: Pugad IslandTaiwan: Nanzi Jiao, 南子礁Vietnam: Đảo Song Tử Tây Occupied by: VietnamLegal Status: RockGPS: 11° 25' 44” N, 114° 19' 54” ETotal area of reclamation: 7.45 acres Overview Images January 6, 2022 December 1, 2017 July 10, 2017 August 4, 2016 March 12, 2016 Analysis of Outpost Vietnam Builds Up Its Remote Outposts Vietnam’s Island Building: Double-Standard or Drop in the Bucket?