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U.S. Navy Sailors assigned to Underwater Construction Team 2, observe a Teledyne Oceanscience Z-Boat 1800 hydrographic survey with Republic of Korea Navy and Royal Thai Navy UCT in Sattahip, Thailand for Exercise Cobra Gold Feb. 19, 2018. Cobra Gold 18 provides a venue for the United States, allied and partner nations to advance interoperability and increase partner capacity in planning and executing complex and realistic multinational force and combined task force operations.