CHANGI, Republic of Singapore (April 25, 2023) Sailors assigned to the Los Angeles-class fast-attack submarine USS Columbia (SSN 771) check their mooring lines at Changi Naval Base, Singapore, during a scheduled port visit, April 25. Columbia is homeported at Joint Base Pearl Harbor-Hickam, Hawaii, and is on deployment in the 7th Fleet area of operations, conducting maritime security operations and supporting national security interests. ( Navy photo by Lt. Mohammad Issa)

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Keywords: navy, sailors, singapore, submarine, submariners