Naval Air Station Jacksonville (NAS Jacksonville) is a major United States Navy base located in Jacksonville, Florida. It is situated approximately 13 miles south of downtown Jacksonville, near the St. Johns River. NAS Jacksonville serves as a hub for naval aviation operations, training, and support in the southeastern United States.

As one of the largest naval bases in the Southeast, NAS Jacksonville is home to several squadrons and units, including maritime patrol and reconnaissance aircraft, helicopters, and various support and maintenance facilities. The base supports both active duty and reserve units of the U.S. Navy, as well as other military branches and international partners.

NAS Jacksonville plays a vital role in training naval aviators and aircrew. The base hosts the Naval Air Technical Training Center (NATTC), which provides specialized training for aviation maintenance, aviation electronics, and aircrew survival equipment. Additionally, it houses the Helicopter Maritime Strike Wing Atlantic, responsible for training and maintaining the MH-60R Seahawk helicopter fleet.

The base encompasses a significant land area, featuring airfields, hangars, administrative buildings, barracks, family housing, recreational facilities, and a hospital. The location near the St. Johns River allows for access to the water, supporting activities such as naval operations, search and rescue missions, and recreational boating.

NAS Jacksonville contributes to the local economy by providing employment opportunities and supporting the surrounding community. It also promotes military-civilian cooperation through various outreach programs, events, and partnerships.

Overall, Naval Air Station Jacksonville serves as a crucial military installation, supporting the mission readiness of naval aviation forces and contributing to national defense.