The names are that of the historical figures, provinces, cities, counties, peaks, lakes, islands, and birds.(Hanja) (light/full, tons) Corvettes (PCC) are named after cities, with the exception of Sinseong (one of Admiral Yi Sunshin's battle grounds).(Hanja) (light/full, tons) Yoon Youngha class (PKG) is named for Navy heroes.(Hanja) (light/full, tons) ATH is named for an island where Admiral Yi Sunshin's HQ was located.Examples of changes (M-R → RR): Chinhae → Jinhae; Kangnung → Gangneung; Kimpo → Gimpo; Kyongju → Gyeongju; Pusan → Busan; Taegu → Daegu.