U.S. Coast Guard Master Chief Petty Officer Jason Olsen, officer in charge of Coast Guard Cutter Scioto, explains important aspects of river buoy tending operations Jan. 15, 2021. River buoy tenders set, relocate, and recover buoys to mark the navigable channel in the rivers as the water level changes, and also establish and maintain fixed aids, lights, and day beacons within their area of responsibility.