The Hyunmoo-3 is a supersonic cruise missile fielded by the South Korean military designed by Agency for Defense Development (ADD).

The name Hyunmoo (Korean: 현무) comes from the mythical Black Tortoise (Chinese: 玄武)[4] described as the "Guardian of the Northern Sky", perhaps hinting North Korea.

[5] Historically a bilateral agreement between the ROK and US additionally limited indigenous South Korean produced missiles in both range and warhead size.

Therefore, heavy emphasis was put on developing long-range cruise missiles by the South Korean government.

Sejong the Great-class destroyers and KSS-III-class submarines will be equipped with these Chonryong[6][7] submarine-launched cruise missiles inside their K-VLS cells.