Marker buoys are still a thing

Lake Navigation Buoy and Marker Reference Guide - Voyageurs

Can't Live Without: Part 2-Marker Buoy

Hazard buoys and markers

Deluxe Surface Marker Buoy (AKA SMB OR DSMB)

DIY Marker Float - Ultra Cheap Fishing Marker Buoy

Marker buoys - AIS

Marker buoys are still a thing

Popping for top water stripers

Southernmost point buoy - Wikipedia

Marker buoys are still a thing

Marker buoys still a thing, Better 'crawler action, Melons of the week – Target Walleye

Navigation Buoys and Channel Markers 101: What Do the Red & Green

Regulatory Buoys - Sealite US

Mississippi River Channel Marker Buoys : r/uscg