R3 was an American-built Peruvian submarine of 576 tons displacement launched in 1928. The R3 was powered by two Nelseco diesel engines providing a top speed of 14.5 knots and a range of 12800 km surfaced and electric motors providing a top speed of 9.5 knots submerged. She carried a complement of 30 and was armed with one 3 inch gun and four 21 inch torpedo tubes in the bow. Research R3
 
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