A few years ago Peaks Yard in Trinidad dropped a nearly new Nordhaven 64 about two feet - totaled it. The owner had spent about three years getting the boat and outfitting it just the way he wanted it. The idiot crane operator used 50,000 pound straps to lift a 90,000 pound boat. The stern, being heavier broke the strap. Even so, no safety margin on his choice of straps.