Since First World War the Italian Regia Marina completed up being deserved great focus on the growth of tiny and fast vessels in most cases armed with torpedoes. The moto torpedo vessels, more called MAS, was civilian vessels variants. Excellent Results achieved during first World War reaches fact remarkable using the sankment, regarding Commandant Luigi Rizzo, of Austro-Hungarian Aquatic battleships Wien and Szent István. Neither less had been notably better for limited seas and shallow water just like the Adriatic water, the Italian aquatic proceeded attempting to enhance the performance of the small but fast moto torpedoes. The MAS 500, prepared fuel machines Isotta-Fraschini, develop during second World War and even more effective and reliable, was in fact surely implemented both as moto torpedoes and anti submarine platforms for level costs dropping. Capable of reaching a premier cost of 40 knots and armed with two 450mm torpedoes.
