A player position determining and course management system for a golf course having a plurality of roving units for use by players in playing the course is disclosed. Each roving unit includes a central processing unit (CPU) including a data processor for executing various tasks ranging from fastest-execution...http://www.google.fr/patents/US6525690?utm_source=gb-gplus-shareBrevet US6525690 - Golf course yardage and information system with zone detection
Golf course yardage and information system with zone detection
