I don't think, it is the 21th century style.
South korean navy is going to operate 6 of these ships.
And then New type of ships will be launched.
length : 114m x 14m x 25m
displacement : 2,300(light weight) / about 3,000t(full load)
machinery : 127mm MK45 Mode4, RAM, 20MM Phalanx CIWS,
ship-to-ship missle x 8 also, ship-to-surface x 8
speed : max 30kts
(from)
http://bemil.chosun.com