The Katsonis was a Greek Katsonis Class submarine of 595 tons displacement launched in 1926. The Katsonis was powered by two sets of 2-cycle Schneider-Carels diesel engines providing a top speed of 14 knots surfaced and 9.5 knots submerged and a maximum range of 5600 km and a diving depth of 45 fathoms. She carried a complement of 39 and was armed ...