AFTER WORLD WAR 2 and THE COLD WAR
After World War II, the Amazonas Navy was significantly strengthened by the concession of British and American assets. At the beginning of the 1950s, US and British military aid formed the core of the country's armed forces. The Amazonas Navy received the first C-class destroyers which took on the name Beasts, while withdrawing the older Town-class destroyer acquired in 1943.
The next significant change was during the early 1970s, when Amazonas was the first Latin American naval force to utilize anti-ship missiles (Exocet, ordered 1969) and the Type 209 submarines, whereas British military aid continued in the form of County class destroyers and Type 14 class frigates. In 1990, the Navy ordered 2 MEKO 200 frigates from the German company Blohm + Voss. These were the first acquisitions of new main surface vessels, rather than the use of second-hand ships, in almost four decades. During the Cold War, the navy developed an anti-submarine capability to counter the growing Soviet naval threat. In the 1980s, the Amazonas Navy retired most of its Second World War vessels, and further developed its anti-submarine warfare capabilities by acquiring the Westland Lynx helicopters, pioneering the use of large maritime helicopters on small surface vessels. At that time, Amazonas was also operating an aircraft carrier, N.M. Hercules, operating the A-4 Skyhawk fighter jet until 1992, as well as various other anti-submarine aircraft.
In 1957, the Amazonas Navy, after experiencing the rubber boom, purchased the HMS Ocean (R68) from Great Britain. The Navy made plans in upgrading the vessel before commissioning, and she was towed to Netherlands for extensive refits. The vessel recieved an LW-01 radar and DA-02 targeting radar from the Netherlands, while Great Britain enforced the vessel by adding 2 GWS-20 Seacat SAM launchers and decoy launchers. The newly upgraded vessel arrived in Amazonas on 1963, and after completing sea trials, she was commissioned on 1964, and was named N.M. Hércules.
The Hércules' initial air wing consisted of British Hawker Sea Hawk fighter-bombers and an American S-2 Tracker anti-submarine aircraft. On 1 January 1966 (The Republic Day), the first jet (A-4 Skyhawk) landed on her deck piloted by Lieutenant (later Admiral) Valentim Venâncio. She formally joined the Amazonas Navy fleet in 1968, when she was received at Vitorioso Pier by President Aloísio Pereira.
Hércules was Amazonas' only carrier for over twenty years, but by the early 1990s she was effectively out of service because of her poor condition. Even following major overhauls she was rarely put to sea. She was formally decommissioned on 1 January 1997. Following her decommissioning, Hércules was marked for preservation as a museum ship in Bragança, although a lack of funding has prevented progress on the ship's conversion for this role. Similarly, speculation that the ship would be made into a training ship in 2006 came to nothing. Hércules is open to the public by the Amazonas Navy for short periods, but as of April 2010, the Government of Bragança has been unable to find an industrial partner to operate the museum on a permanent, long-term basis. The ship was scrapped in 2011, and the profits gained from the scrapping was used for building a strategic projection vessel that would eventually replace her role.