 In 1926 the rangefinders were upgraded and a fixed aircraft catapult was mounted on the port side of the forecastle for a Macchi M.18 seaplane.By the early 1930s, the "Regia Marina" had begun design work on the new s, but it recognized that they would not be complete for some time.As a stop-gap measure in response to the new French s, the navy decided to modernize its old battleships; work on the two surviving "Conte di Cavour"s began in 1933 and the two "Andrea Doria"s followed in 1937.