victory at sea regia marina submarines mtb sectionsSubmarines: Compared to a German Type VII C submarine, the Marcello class were much larger, displacing 1,060 tons versus 769. Speed and range between the two classes were almost similar, but the Marcello class had more torpedo tubes than the famous U Boat. The Marcello class should be considered one of the most successful produced by the Italian shipyards and showed very good qualities being fast, structurally robust and relatively manoeuvrable. MTBs: