Fateh is Iran's third native-built submarine design. The first is the Ghadir-class midget sub, which as the name suggests is not a terribly fearsome weapon of war. The Ghadirs are based on a North Korean design, displace about 123 tons, and estimates range that there are between 10 and 19 in Iranian service. According to Michael Connell, director of the Iranian Proogram at the Center for Naval Analysis, In 2007, Iran launched a demonstrator submarine called the Nahang, which is still in service. The Fateh is larger than both of these, which means it can carry more torpedoes or underwater mines, and can venture further away from coastal waters and home ports, making it deadlier and more useful for the Iranian navy.