In an embodiment of the invention, the uplink comprises one or more segments such as illustrated by segments 113A, 113B, 113C, and 113D shown in FIG. 1, the aggregate transmission time as the client's request travels from one component of the navigation system shown in FIG. 1 to the next via segments 113A, 113B, 113C, and 113D is the uplink delay in an embodiment of the present invention.