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The guided missile frigate USS STEPHEN W. GROVES (FFG-29) takes on fuel from the Brazilian oiler MARAJO (G-27) during underway replenishment operations. Both vessels are taking part in Unitas XXXI, an annual, joint exercise between the Navy and the naval forces of nine South American countries. Subject Operation/Series: UNITAS XXXI Country: Atlantic Ocean (AOC)
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Photo credit: © NB/ROD / Alamy / Afripics
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