190409-N-ZZ999-008 ANDAMAN SEA (April 9, 2018) A Royal Thai Navy helicopter hovers over the Los Angeles-class attack submarine USS Louisville (SSN 724) during Guardian Sea 2019. Guardian Sea is a premier exercise that demonstrates the U.S. and Royal Thai Navy’s commitment to ensuring that they are ready to counter any threats together. (U.S. Navy photo by Lt. Matt Zeismer/Released)