During the Second World War, the US Navy built several classes of marine V-12-powered PT boat, whose hull classification symbol "PT" stood for "patrol, torpedo", but which were grouped into motor torpedo boat squadrons. German diesel-powered torpedo boats of the Second World War were called "S-boote" ("Schnellboote", "fast boats") by the "Kriegsmarine" and "E-boats" by the Allies. These large craft (well over 100 ft overall) were not known as motor torpedo boats at the time, but later have been grouped with them by some. Italian MTBs of this period were known as "Motoscafo Armato Silurante" ("MAS boats", torpedo-armed motorboats). French MTBs were known as "vedettes lance torpilles" ("torpedo-launching fast boats"). Soviet MTBs were known as "торпедные катеры" ("torpyedniye katyery"; "torpedo cutters", often abbreviated as "TKA"). Romanian MTBs were known as "vedete torpiloare" ("torpedo fast boats").