These man driven torpedoes concept have it`s origins in late WWI buy Italians, when they successfully sank the Austrian battleship “Viribus Unitis” using a primitive man driven torpedo. The idea resurfaced shortly before WWII when the SLC were developed. The SLC, "Silura the Lenta Corsa" (Low Speed Torpedo) was the most famous weapon of attack the Italian Regia Marina (overall known for it`s weak attack performance in the conflict) employed during World War II. This new "torpedo˜, which earned the nickname "Maiale" (pig), was modified from a single man concept, to a two "cockpits" version to accommodate two divers (then known as "frogmen"), having an electric engine (batteries) and equipped with control surfaces, tanks ballast and compressed air to release the ballast, allowing full underwater navigation, like a submarine. After the necessary engineering work, the first four copies were ordered from Officine San Bartolomeo in La Spezia. These first were used for staff training. It was during this training period that one of the officers enrolled in the program would have told his co-operator "Accelerate this pig!" ("Maiale" in Italian), thus giving rise to the nickname of the SLC. To operate such weapons, the Italian navy created Flottiglia X ª MAS, based in La Spezia, near Genoa. With the near outbreak of war in Italy, work was rushed and submarines were adapted to load these Maiali. Thus the "Decima MAS" was declared operational on February 24, 1940, to become Italy`s most famous special-ops outfit during WWII. The Maiali were extensively and successfully used in Alexandria, Algiers and Gibraltar against the Allied Navy up to late 1943.
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