Registration is now open for The Institute of Navigation (ION) Eighth Annual Robotic Lawn Mower Competition to be held June 2-4, 2011, at Siebenthaler’s Beaver Valley Garden Center near Dayton, Ohio. "The purpose of the competition is for universities and colleges to design and operate a robotic unmanned lawnmower using the art and science of navigation to rapidly and accurately mow a field of g…