The Caio Duilio was an Italian Duilio Class dreadnought of 24500 tons displacement launched in 1913 and rebuilt in 1939 as a Cavour Class battleship of 23622 tons displacement. The Caio Duilio was powered by eight 3-drum type boilers providing a top speed of 27 knots and carried a complement of 1074 increased to 1198 after rebuilding. She was originally armed with thirteen 12-inch guns; sixteen 6-inch guns; thirteen 14 pdr guns, three of which were removed for the duration of the Great War; six 14 pdr anti-aircraft guns; two machine-guns and four 18-inch torpedo tubes. After reconstruction prior to the Second World War she was armed with ten 12.6 inch guns; twelve 5.3 inch guns; ten 3.5 inch anti-aircraft guns; thirty-nine anti-aircraft machine-guns and carried four aircraft. Research Caio Duilio
The Caio Duilio is an Italian Andrea Doria Class cruiser of 5000 tons standard displacement launched in 1962. She carries a crew of 470 including 45 officers and is powered by two double reduction geared turbines rated at 60000 shp and four Foster-Wheeler boilers providing a top speed of 31 knots and a range of 8000 km at 17 knots. Armaments consist of 40 GDCPomona Standard SM-1ER surface-to-air missiles in twin Mk 10 Mod 10 launchers; six OTO Melara 76 mm/62 MMK guns in single turrets, three on each side amidships abreast the funnels and the bridge; six 324 mm US Mk 32 in two triple arrangements torpedo tubes. Two AB 212ASW helicopters are also carried. Research Caio Duilio II
 
The Probert Encyclopaedia was designed, edited and programed by
Matt and Leela Probert