Group : Anti-Ship Missiles
Status : Active
Also Known As : CH-SS-N-13, YingJi-18
Origin : China
Initial Operational Capability (IOC) : 2014
Total Production : ?

The CH-SS-N-13, CH-SS-NX-13 developmental name, is an advanced submarine launched anti-ship cruise missile (ASCM) designed to equip the People's Liberation Army (PLA) Navy conventionally- and nuclear-powered attack submarines such as Song, Yuan and Shang classes. As of August 2010, the missile is still being developed and tested by the PLA Navy. The CH-SS-N-13 missile was re-designated as the YJ-18.

The YingJi-18 (YJ-18 or Eagle/Hawk-18) is a vertically-launched, long-range, supersonic, sea-skimming anti-ship missile designed by China to kill US Navy's Aegis-equipped destroyers or its equivalents provided to Japan, South Korea or European Navies. The YJ-18 is planned for deployment by the newest People's Liberation Army Navy (PLAN) Type 052D class destroyers and subsequently may be incorporated into existing destroyers and submarines as part of a modernization effort. Its guidance system consists of an advanced inertial navigation, maybe backed by the Beidou Chinese GPS, plus an active radar seeker in the terminal phase. Besides, a built-in data link allows the carrier ship to update the target's location. The Aegis-killer missile existence was first reported in 2013 with an entry into service expected by 2014 or later.

The YJ-18 missile is equipped with a 300 kg high explosive (HE) warhead capable of taking out a destroyer-sized ship. The HE warhead can be replaced by an anti-radiation/electromagnetic pulse warhead that is said can take down up to 60 percent of the enemy ship's electronic systems at a range of 50 meters after detonating. After the vertical launch the missile's turbojet engine is capable of flying at a cruise speed of Mach 0.8 for about 180 kilometers after that point the warhead section separates and a solid rocket engine ignites allowing at a top speed of Mach 2.5-3 for about 40 kilometers. The missile can maneuver at 10G acceleration to avoid enemy interception by air-to-air or surface-air missiles. The missile design and performance is very similar to Russia's 3M54E which may have been the template for the YJ-18.