The BargeTrac system is a solar powered low current circuit. It is an evolution of the proprietary eTrac circuit board. BargeTrac uses two GPS units to improve positional accuracy and generate accurate heading data on metal barges on which a compass would not be effective.
The pyTrac software package integrates BargeTrac data and NMEA GPS data for display on Google Maps or Google Earth, generating realtime HTML reports and updating the map with representations of barges and tugs. This allows tug operators to keep an eye on other tugs and barges even outside of radar range, monitor barge displacement to detect leaks, and retrieve barges that have come unmoored.