a navigation system, which measures the angular rotation of a wheel and calculates the distance which the feeding vehicle has moved based on the radius and the angular movement of the wheel.    The Danish patent DK 177 406 B1 describes a feeding vehicle having a feeding pipe divided into two pipe sections and a servo motor for moving the feeding pipe.    The European patent application EP 366 350 A2 describes a vehicle for primarily unmanned operation equipped with an upwardly pointing video camera which during a manually driven learning mode observes overhead features which during a subsequent unmanned trip are used for guidance.    The Dutch patent NL 1020093 relates to an autonomous vehicle having a detector for detecting floorLake; · Prime potential home sites with views of the village, lake and steepled church; · Highly aesthetic forest with ±6,250 potential maple taps; · Forest intensely managed since 1960 by current owner. The property is located just 12 minutes' walk from the center of Barnard Village, a tiny but culturally diverse community located in central Vermont. At its heart is 84-acre Silver Lake, which hosts seasonal and year-'round shoreline homes, a town beach and a state park at its northern end. Across from the lake is the Barnard General Store, a popular stop featuring local prepared foods. The village is an active and popular, four-season destination for locals and tourists alike, with lodging available at several bed and breakfast establishments. Woodstock Village is 10 miles to the