Petley Reef Petley Reef is a rock located in the Spratly Islands. Vietnam first took possession of the feature in 1988. U.S. Board of Geographic Names: Petley ReefChina: Bolan Jiao, 舶兰礁Philippines: Juan Luna ReefTaiwan: Bolan Jiao, 舶蘭礁Vietnam: Đá Núi Thị Occupied by: VietnamLegal Status: RockGPS: 10° 24' 38.16" N, 114° 35' 15.61" E Overview Images May 25, 2020 April 25, 2017 March 1, 2014 Analysis of Outpost Vietnam Builds Up Its Remote Outposts