I'm not sure we're talking about the same one. See Storm's email/link below: http://www.watersportfun.bizland.com/sub.htm Looks more like 2 antennas (alien) than a single foil. Jay S. No Jay, thats the one he's talking about. The only way I could see this thing working is ambient dry to about 60 feet. You would have to be dragging a fuel tanker for the 350mile range though