Glauco-class submarine

The Glauco class was a pair of ocean-going submarines, Glauco and Otaria, that the Cantieri Riuniti dell'Adriatico built to a design by its chief engineer Curio Bernardis, based on the Squalo class. They were ordered by the Portuguese government in 1931, but the Italian Navy took them over when Portugal cancelled the order and completed them for the Regia Marina in the mid 1930s. They displaced about 1,054 long tons on the surface and 1,305 long tons submerged, were 73 metres long and had two 1,500 horsepower FIAT diesel engines. Glauco was laid down in October 1932, launched in January 1935 and completed that September. Both boats played a minor role in the Spanish Civil War supporting the Spanish Nationalists.