I was towing my 18 ft ski boat across slightly bumpy water one day, when the front rope broke, spinning the ski boat around backward, and towards the houseboat. Fortunately, I always tow it on the starboard side, so I can see it while I drive. I was able to stop the houseboat before the ski boat hit. Nowadays, I always use TWO ropes on the bow! LOTS of fenders is a good thing.