next two years. Rivadavia was converted to use fuel oil instead of coal and had "a general machinery overhaul". A new fire-control system was fitted with rangefinders on the fore and aft superfiring turrets, and the aft mast was replaced by a tripod. A funnel cap was installed so that smoke from the funnels did not interfere with accurate rangefinding of enemy ships. The 6-inch secondary armament was retained, but the smaller 4-inch guns were taken off in favor of four anti-aircraft guns and four 3-pounders. After sailing back to Argentina in March and April 1926, Rivadavia spent the remainder of the year undergoing sea trials. The dreadnought joined the training division once again in 1927, but after Rivadavia made four training cruises, the division was disbanded, and the ship remained moored in Puerto Belgrano until 1929. This began a series of cyclic activity followed by being demoted to the reserve fleet. Although active in both 1929 and 1930, Rivadavia was placed in reserve on 19 December 1930. Shortly thereafter, it was restored to active service to serve as the flagship for 1931 fleet exercises. Rivadavia went back into reserve in 1932 before coming back out in January 1933. It remained in full commission for most of the rest of the decade as part of the Battleship Division, alongside Moreno. In January 1937, the ship called on Valparaíso and Callao in Peru. In company with Moreno, Rivadavia left Puerto Belgrano for Europe on 6 April. After crossing the ocean, they split up, with Rivadavia mooring at the French port of Brest while Moreno took part in the British Coronation Review in Spithead. The two ships then journeyed to several German ports: both put in at Wilhelmshaven before Rivadavia went to Hamburg and Moreno to Bremen. They returned to Argentina on 29 June. While Rivadavia made an official visit to Rio de Janeiro, Brazil, in 1939, Argentina remained neutral for the majority of the Second World War, and the aging dreadnought saw no active service. Its next cruise came after the war ended (29 October to 22 December 1946), when it called on countries in the Caribbean and northern South America, including Trinidad, Venezuela, and Colombia. This was the last time the ship would be in service under its own power. Moored in Puerto Belgrano from 1948 on, the ship was rendered inoperable in 1951 and cannibalized for many years for