Topic summary
SLBM

Extracted from the Wikipedia article Submarine-launched ballistic missile.
A submarine-launched ballistic missile (SLBM) is a ballistic missile capable of being launched from submarines. SLBMs almost exclusively carry one or multiplenuclearwarheads, and play an important role in nuclear strategy as a highly reliable and non-vulnerable second strike option. Nuclear-armed SLBMs are operated by China (JL-3), France (M51), India (Sagarika), Russia (Sineva, Lajner, and Bulava), the United Kingdom and the United States (both Trident II). South Korea is the only nation developing a conventionally-armed SLBM, the Hyunmoo 4-4.