Hang-upstm are a better way to deploy fenders over the side. They are secure, easy to adjust up or down, and once adjusted, they do not creep or loosen, and will not scratch your boat.
Hang-upstm are easy to adjust. Simply ease the fender line loose from the hang-uptm. Adjust up or down, and snug it back down. The more force on the fender from the dock or wall, the more secure the rope gets.