Frigates
Frigates (according to the modern classification of U.S. navy warships) are smaller ships than destroyers. They are designed primarily to protect other ships (such as merchant convoys), and perform some Anti-Submarine Warfare duties. They are of more limited scope than destroyers, but are also more cost-efficient.
- Oliver Hazard Perry class (24 in commission)
Read more about this topic: Naval Ships Of The United States