Abstract: A portable GPS unit (10) communicates over a wireless radio network (12) with at least one other such unit (10A-10E). The unit (10) may transmit radio signals over the network (12) indicative of the unit's location and receive similar radio signals from the other units (10A-10E). The unit (10) is operable to calculate and display a route that may be followed to go to a moving waypoint such as one of the other units (10A-10E).

Abstract: A portable GPS/radio unit (10) communicates over a wireless radio network (12) with at least one other such unit (10A-10E). The unit (10) may transmit radio signals over the network (12) indicative of the unit's location and receive similar radio signals from other such units. The unit (10) is operable to display an indication of the distance between two or more units, an indication of the amount of time that has elapsed since location data was last received from another unit, a track log or track back information for another unit, and an indication if the unit (10) is about to lose communications with another unit. The unit (10) also may be operated to gather and transmit to other units location data corresponding to way points. The perspective or vantage point from which location data and other information is viewed may be selected or changed by the user of the unit (10).

Abstract: A personal training device (10) adapted to assist a user in reaching performance goals, navigating, and accumulating performance statistics. In a preferred embodiment, the device broadly comprises a housing (10); an attachment mechanism (30); a GPS component (40); a user interface (50), including an input portion (52) and an output portion (54); a processor (60), including a timer (62) and a memory element (64); a data interface (70), including an input portion (72) and an output portion (74); an audio component (80); and a power supply (90). The device (10) is adapted to store goal information, monitor performance using GPS-derived data, and communicate performance information.