GULF OF THAILAND (Sept. 4, 2019) - The Republic of Singapore Navy's RSS Tenacious (71) steams in the Gulf of Thailand during a photo exercise as part of the Association of Southeast Asian Nations (ASEAN)-U.S. Maritime Exercise (AUMX). The first AUMX, co-led by the U.S. and Royal Thai navies, includes maritime forces from the U.S. and all 10 ASEAN member states. AUMX promotes shared commitments to maritime partnerships, security and stability in Southeast Asia. (U.S. Navy photo by Mass Communication Specialist 1st Class Greg Johnson)