What is DF-21D? A Chinese anti-ship ballistic missile “aircraft carrier killer”
DF-21D
DF-21D is the first anti-ship ballistic missile (ASBM) in the world developed by China. Conventional ballistic missiles strike fixed targets on land; while the DF-21D targets moving American aircraft carriers. It is designed to prevent the U.S. fleet in the Pacific from approaching Taiwan at a distance of 1500 km. Therefore, it is nicknamed the carrier killer. It is the main weapon in China’s anti-access/area denial (A2/AD) strategy.
What is DF-21D?
DF-21D (Dong Feng-21D) is the first anti-ship ballistic missile (ASBM) in the world produced by CASIC. Its NATO reporting name is CSS-5 Mod-4.
The reason these weapons are revolutionary is as follows:
- Conventional ballistic missiles strike fixed targets on land (city, command center, airbase). The target coordinates are known before launch.
- The DF-21D is designed to strike a moving aircraft carrier. An aircraft carrier can travel in open sea at a speed of 50 km/h; at the moment of launch, its location cannot be predicted every minute.
- The solution: the missile detects the large metal target (aircraft carrier) at sea using radar and electro-optical sensors in the front during re-entry into the atmosphere and locks onto it.
- Meanwhile, the speed reaches Mach 10+; thus, the ship has almost no time to escape.
The strategic objective: “Anti-access/Area denial” (A2/AD). China wants to make it impossible for American aircraft carriers to approach Taiwan to deter any potential American intervention in the Taiwan issue. The range of the DF-21D, which is 1500 km, covers the entire first island chain (Japan-Taiwan-Philippines).
American defense analysts describe the DF-21D as a “game changer” — as American naval operational assumptions in the Pacific have changed with this weapon. The United States continues to develop the SM-3 / SM-6 Standard Missile family in response; while American aircraft carriers are moving towards using long-range munitions and unmanned platforms to avoid entering direct range.
Its longer-range sibling DF-26 (over 4000 km) is known as the “Guam Killer” — as it can reach American bases in Guam. The family continues to expand.
