This is CRAZY
However, I bought a used plastic billboard, the plastic they use now is 4 or more times thicker than the blue tarps,the advertisement is painted on one side, the other side is white, the size I got was 15 X 45 feet, I rigged the tarp onto the boat,( only used 20 feet of it) I tied it off using 1x3" pieces of wood set into the "pockets" sewed onto the edges of the tarp. I did this mid October, there have been strong winds, snow and many rain storms, The cover never moved. I removed the boom, and use the dodger frame for support, along with supports I made. air flow is maintained over the boat. Total cost for the tarp and all wood and supplies $ 30.00!