"The Navy in 2017 initiated a new program, called the FFG(X) program, to build a class of 20 guided-missile frigates (FFGs). The Navy wants to procure the first FFG(X) in FY2020, the second in FY2021, and the remaining 18 at a rate of two per year in FY2022-FY2030. The Navy's proposed FY2019 budget requests $134.8 million in research and development funding for the program. Although the Navy has not yet determined the design of the FFG(X), given the capabilities that the Navy's wants the FFG(X) to have, the ship will likely be larger in terms of displacement, more heavily armed, and more expensive to procure than the Navy's Littoral Combat Ships (LCSs). The Navy envisages developing no new technologies or systems for the FFG(X)--the ship is to use systems and technologies that already exist or are already being developed for use in other programs."
CRS Report for Congress, R44972