Grupo Hemas, a Mexico-based logistics and security firm, has contracte with Savi Networks to provide automatic monitoring of the location, security and condition of shipments transported throughout the supply chain. Grupo Hemas will use the SaviTrak service by leveraging wireless GPS location and existing cellular infrastructure to offer its customers cargo tracking, inventory management, and immediate detection of security breaches. The deal expands SaviTrak service into Mexico. Savi Networks is a joint venture between Lockheed Martin‘s [LMT] Savi Technology business unit and Hutchison Port Holdings.