Abstract: A global position receiver receives navigation signal from navigation satellites, in space, from a fixed location on a golf course, the location defined in stable location data. Location data derived from the navigation signals defines the fixed location in unstable location data. The stable location data and the unstable location data are compared for generating an error signal. A mobile global position receiver, on a fairway of the golf receives concurrently transmitted navigation signals from the navigation satellites from an undefined location. Location data derived from the navigation signals by the mobile unit defining the location of the mobile unit in unstable location data is combined with the error signal generating stable location data defining the undefined location of the mobile unit on the fairway. The distance and direction of a golf ball from the mobile unit, are measured.

Abstract: An electronic golf scoring system which includes a scoring subsystem installed for example in a golf cart or carried manually on the golf course; a handicap subsystem installed for example in a fixed location, e.g. in a clubhouse or the like; a portable data memory device that serves for transferring data between the scoring subsystem and the handicap subsystem; some interface or means for reading data into and out of the memory device connected to and being part of both the scoring subsystem and the handicap subsystem, wherein the data includes player identification data identifying each player preparing to play a round of golf and golf course pictorial data which serve to provide pictorial features of the chosen golf course, and other data as may be useful to the players.