Brazil's navy, the second-largest in the Americas, once operated some of the most powerful warships in the world with the two dreadnoughts, which sparked a South American dreadnought race between Argentina, Brazil, and Chile. Today, it is a green water force and has a group of specialized elite in retaking ships and naval facilities, GRUMEC, unit specially trained to protect Brazilian oil platforms along its coast. It is the only navy in Latin America that operates an aircraft carrier, PHM Atlantico, and one of the ten navies of the world to operate one.