Coast Guard Seaman Carson Dezenzo from Aids to Navigation Team St. Petersburg replaces the #4 on the Siesta Key-Tampa Bay light in Sarasota, FL May 7, 2020. The Coast Guard is responsible for ensuring the network of waterway navigation signs, symbols, buoys, markers, lighthouses, and regulations are up to date and functioning properly so recreational and commercial boaters can safely navigate the maritime environment. U.S. Coast Guard photo by Petty Officer 3rd Class Sean Greeley.