A ship-borne helicopter implements vertical replenishment as it hovers above the guided-missile destroyer Yinchuan (Hull 175) during the first underway replenishment (UNREP) conducted by the 34th Chinese naval escort taskforce in eastern waters of the Gulf of Aden on February 3, 2020. (eng.chinamil.com.cn/Photo by Chen Wencai and Cai Shengqiu)
