Its main missions are gathering data of ports in the Korean region, and searching naval mine and minesweeping, in wartime.

Therefore, North Korea inflicted massive damage by the naval mine.

Compared to Ganggyeong-class, Yangyang-class ships improved minesweeping ability, and increased hull size.

It also minimized metallic equipment to tightly control the magnetic material inside the ship.

Steel objects that are brought into the ship, like canned food, are heavily restricted and strictly controlled.