The combat stores ship USNS Spica (T-AFS 9) approaches USS Harry S. Truman. Underway replenishment is the method by which provisions, ammunition and fuel are transferred from one ship to another at sea. The technique enables a fleet or naval formation to remain at sea for prolonged periods of time. Spica is one of six combat stores ships operated by the Navy's Military Sealift Command and crewed by Department of the Navy civilian mariners. Harry S. Truman is on a regularly scheduled deployment, conducting missions in support of Operation Enduring Freedom. U.S. Navy photo by Photographer?s Mate 2nd Class John L. Beeman.