![The Largest Submarine in the U.S. Navy!](https://wingsoverkansas.com/wp-content/uploads/2020/08/UxB11eAl-YE-678x381.jpg)
The USS Pennsylvania was known as the largest at the time it was commissioned as a United States Navy Ohio-Class ballistic missile submarine in 1989. Since then, new and updated ballistic missile and guided missile submarines have evolved , however a select number remain secret and classified.