Italian cruiser Etna ship for Rear Admiral Alfredo Acton during the Battle of the Strait of Otranto. The old cruiser was sold for scrapping on 15 May 1921, and was the last surviving ship of her class. Italian cruiser Etna Etna was a protected cruiser of the Italian "Regia Marina" (Royal Navy) built in the 1880s. She was the lead ship of the , which included three sister ships. Named for Mount Etna on the island of Sicily, the ship was laid down in January 1883, was launched in September 1885, and was completed in December 1887. She was armed with a main
Mount Etna volcanic edifice, forming a stratovolcano in alternating explosive and effusive eruptions. The growth of the mountain was occasionally interrupted by major eruptions, leading to the collapse of the summit to form calderas. From about 35,000 to 15,000 years ago, Etna experienced some highly explosive eruptions, generating large pyroclastic flows, which left extensive ignimbrite deposits. Ash from these eruptions has been found as far away as south of Rome's border, to the north. Thousands of years ago, the eastern flank of the mountain experienced a catastrophic collapse, generating an enormous landslide in an event similar to that seen in the 1980