| http://www.w3.org/ns/prov#value | - The method as set forth in claim 1 for determining the positions with respect to the earth of said vehicles, including the steps of: (a) measuring at some vehicles the ranges to fixed stations having known earth positions; (b) transmitting these ranges to said receiving station; and (c) including the coordinates of said fixed-station 1ocations in said computer processing and display steps to orien
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