There is a sunken sailboat in the bay where we are anchored. It is about 12” under the water and makes for a serious hazard if anyone ran into it. We’ve warned other boaters as they have entered the anchorage, but we wanted to do something more permanent. With a cinder block and a buoy found on shore, Peter created a mark for other boaters to keep from hitting the sunken boat. It's our good deed for the day.