Spanish submarine C-3
Spain
C-3 was a C-class submarine of the Spanish Navy in commissioned in 1929. She served initially under the Kingdom of Spain, then as a unit of the Spanish Republican Navy under the Second Spanish Republic. She took part in the Spanish Civil War on the side of Republican faction loyal to the government of the Second Spanish Republic. During the civil war, the German submarine U-34 sank her on 12 December 1936.
Archaeological site data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).