Chesapeake Bay Interpretive Buoy System

Chesapeake Bay Interpretive Buoy System (CBIBS) is a network of observational buoys that are deployed throughout the Chesapeake Bay to observe the estuary's changing conditions and to serve as way points along the Captain John Smith Chesapeake National Historic Trail. They are maintained by the United States National Oceanic and Atmospheric Administration (NOAA).

Source: Wikipedia — Chesapeake Bay Interpretive Buoy System (CC BY-SA 4.0)