What is the designation for a ballistic missile submarine?

A ballistic missile submarine is designated as SSBN, where "SS" stands for submarine and "BN" indicates it is designed for ballistic missile operations, specifically indicating its capability to carry and launch ballistic missiles. This classification is crucial because it differentiates these submarines from others that might have different purposes or capabilities. For example, the designation SS refers to general submarines, while SSN indicates submarines designed for nuclear attack roles, which are primarily focused on offensive operations rather than strategic deterrence. The SSBN subclass is specifically built and equipped for strategic deterrence missions, enabling long-range missile capabilities essential for national defense strategies.

The designation SSG refers to guided missile submarines that are generally equipped with cruise missiles rather than ballistic missiles, further highlighting the importance of the specific roles each submarine class plays within naval warfare.