 In what became one of the very last surface engagements between Italian and Allied naval forces, the American destroyers USS "Rhind" assisted by the USS "Gherardi", sank "MS 66" and disabled "MS 63", in the course of a naval sweep west of Capo d'Orlando, Sicily on 3 August 1943.The damaged "MS 63" managed to limp away after firing a torpedo at "Gherardi".Of the 36 boats built, 14 survived the conflict.