The Siluro a Lenta Corsa (Slow Moving Torpedo), better known as "Maiale" (Pig), was first developed in 1935 by Captains G.N. Toschi and Tesei; the idea was to make the medium arrive, with a crew of two men, under the hull of enemy ships at anchor, to anchor a delayed burst explosive charge to a cable taut between the anti-roll bilge keels. During the Second World War, the SLC damaged or sank 16 ships overall, including the two English battleships Valiant and Queen Elizabeth, for a gross tonnage of approx. 200,000.