I made this particular buoy reminder seen sitting atop the lower helm instrument cluster on my trawler, but I once saw a commercially produced one in plastic. There are plenty of places on the east and Gulf coasts where the ICW and other channels intersect, and you can go through several changes in buoyage in short order. This little device is handy in those places, especially when handing over the helm to the next watch. I've been looking around for one online, but as yet have not found one. I may have to get my tools out to make one for this boat. Sure, you can just pay attention to the chart without this device, and I have done that a LOT, but I like this thing too.
FROLIC (2005 MainShip 30 Pilot II)
Panama City area