Patent ID: 7196659

Claim:
A portable communication and navigation unit comprising: a navigation receiver for receiving signals from a plurality of sources; a computing device coupled with the navigation receiver for calculating a location of the communication and navigation unit as a function of the received signals; voice communication equipment for permitting voice communications with another communication and navigation unit; a radio receiver coupled with the computing device for receiving from the other unit a radio signal indicative of a location of the other unit and an identifier associated with the other unit; a display coupled with the computing device for indicating the location of the other unit; a radio transmitter coupled with the computing device for transmitting to the other unit a radio signal indicative of the location of the communication and navigation unit and an identifier associated with the communication and navigation unit; a portable, handheld housing for housing the navigation receiver, the computing device, the voice communication equipment, the radio receiver, the display, and the transmitter; and an input coupled with the processor for permitting a user to select the identifier associated with the communication and navigation unit and the identifier associated with the other unit.