The Knox-class frigate is a class of naval vessels built for the United States Navy during the 1960s. Designed primarily for anti-submarine warfare, these ships were equipped with advanced sonar systems and torpedoes. A total of 46 Knox-class frigates were constructed, serving as a vital part of the Navy's fleet during the Cold War. These frigates are characterized by their long hulls and a flight deck capable of supporting helicopters. The Knox-class was eventually replaced by more modern vessels, but many of these ships continued to serve in various navies around the world, showcasing their durability and versatility.