Mars Artillery Type 11S) is a North Korean solid-fueled submarine-launched ballistic missile (SLBM).
Compared to previous North Korean SLBMs like the Pukguksong-1 and its larger derivatives, it retains the depressed trajectory and manoeuvring flight characteristics of Hwasong-11A (KN-23) to try to evade missile defence systems.
Since it is based on a missile with a shorter range than the Pukguksong-series, the submarine would need to get closer to its target in order to launch, leaving it more vulnerable to detection and destruction before it can be fired.
[10] North Korea first displayed Hwasong-11S in October 2021, during the "Self-Defence 2021" military exhibition without revealing its official name.
[16][17] According to the International Institute for Strategic Studies (IISS), as of 2024, North Korea is possessing "some" Hwasong-11S missiles.