Abstract: In one aspect, the present invention relates to identifying locomotive consists within train consists, and determining the order of the locomotives within the identified locomotive consists. By identifying locomotive consists and the order of locomotives within such consists, a railroad can better manage it locomotive fleet. In one exemplary embodiment, an on-board tracking system for being mounted to each locomotive of a train includes locomotive interfaces for interfacing with other systems of the particular locomotive, and a computer coupled to receive inputs from the interface, and a GPS receiver and a satellite communicator (transceiver) coupled to the computer. Generally, the onboard tracking systems determine the absolute position of the locomotive on which it is mounted and additionally, obtain information regarding specific locomotive interfaces that relate to the operational state of the locomotive.