Adua-class submarine

The Adua class was the fourth sub-class of the Italian 600 Series of coastal submarines, seventeen boats built for the Regia Marina between 1936 and 1938. Most were named after places in Ethiopia, which Italy had occupied since 1936. The design repeated the preceding Perla class, with a length of about 60 metres, and two diesel engines for surface running. The boats came from three yards: Odero Terni Orlando at Muggiano, Tosi at Taranto and the Cantieri Riuniti dell'Adriatico yard at Monfalcone, which built the lead boat Adua, laid down in March 1936, as well as Alagi, Aradam and Axum. Three boats, Gondar, Ascianghi and Neghelli, were sold to Brazil before the war and replaced by new boats of the same names. Only Alagi survived the Second World War.