190409-N-ZZ999-002 ANDAMAN SEA (April 9, 2018) The underway replenishment oiler USNS Guadalupe (T-AO 200) and the Royal Thai Navy frigate HTMS Bhumibol Adulyadej (FFG 471) sail in formation with three other ships from the U.S. Navy and Royal Thai Navy during Guardian Sea 2019. Guardian Sea is a premier exercise that demonstrates both navies commitment to ensuring that they are ready to counter any threats together. (U.S. Navy photo courtesy of the Royal Thai Navy by Cmdr. Kamchai Charoenpongchai/Released)