The Fourth Fleet is headquartered at Naval Station Mayport in Jacksonville, Florida. It is responsible for U.S. Navy ships, aircraft and submarines operating in the Caribbean Sea, and the Atlantic and Pacific Oceans around Central and South America.
Located at Naval Station Mayport in Jacksonville, Florida, the Fourth Fleet is in charge of U.S. Navy ships, planes, and subs that sail through the Caribbean Sea and around Central and South America in the Atlantic and Pacific Oceans.