Fleet ballistic missile submarines are one of the most important elements of the US Navy's nuclear deterrent. Capable of firing nuclear missiles at targets thousands of miles away, these submarines provide the President and the United States with a powerful form of defense.

A fleet ballistic missile submarine is a very large and advanced type of submarine. They are typically armed with 16 ballistic missiles and can carry a very large nuclear payload. Fleet ballistic missile submarines are fairly fast, making them difficult to detect and attack.

The primary mission of a fleet ballistic missile submarine is to launch nuclear missiles at targets in other countries.