The Chungnam-class frigate is a class of frigates of the Republic of Korea Navy (ROKN). The Chungnam class is based on the preceding Daegu class. Which in turn is based on the Incheon class, and has otherwise been referred to as the Incheon-class batch III, FFX-III, or FFG-III. Confusingly, the FFX Batch III is sometimes called the Ulsan class. The Ulsan class, were the predecessors to the FFX program, preceding the Incheon-class (FFX-I class). Ulsan is also the name of FFX Batch IV.
== History == The first ship was launched in April 2023. Construction of the second ship started on 27 July 2023 with a steel cutting ceremony at the SK Oceanplant.
== Features == The Chungnam class is reportedly capable of intercepting up to eight incoming missiles.
== Export == The Chungnam-class frigate was derivatived as the HDF-4000TH, offered by Hyundai Heavy Industries to the Royal Thai Navy. It is equipped with 2 8-cell Barak missiles for Area defense and Point defense, Blue Spear anti ship missile and a SPY-400K fixed-phased array radar.
Ships in the class
== See also == List of frigate classes in service
=== Equivalent frigates of the same era === Mogami class FF(X) Tamandaré class Miguel Malvar class Istanbul class FDI Baden-Württemberg class