The Coast Guard is establishing a temporary safety zone for certain navigable waters within St. John's River in Jacksonville, FL. This action is necessary to provide for the safety of life on these navigable waters during the Naval Air Station Jacksonville Air Show. Entry of vessels or persons into this safety zone is prohibited unless specifically authorize by the Captain of the Port Sector Jacksonville or a designated representative.
Source: Federal Register USCG
Link: Safety Zone; NAS Jax Air Show; St. John's River, Jacksonville, FL