Have not built mine yet but I know how I'm gonna do it. I set a 30' telephone pole, tonight as a matter of fact. My dock is now to be a floating one as the water filled up too fast and i did not get my poles set. I'll run the cable from the pole across the end of the dock and into the dam 200 feet away. Of the end of the dock I'll build a 10' ladder platform for a launching pad. That's the safest way I could think of. At least they wont be airborn over anything but water. I plan to use a auger type cable anchor. They screw into the ground and the Electric company guys said they'll more that hold the load i'll need. I forgot the holding strength he said but it was in the thousands of pound force. The anchor will be a couple feet above the water level so the water will drag them off is they forget to let go.