The United States Congress authorized the original six frigates of the United States Navy with the Naval Act of 1794 on 27 March 1794 at a total cost of $688,888.82. These ships were built during the formative years of the United States Navy, on the recommendation of designer Joshua Humphreys for a fleet of frigates powerful enough to engage any frigates of the French or British navies yet fast enough to evade any ship of the line.