NET TRACKER S.A., is an Argentinean company devoted to the study, development and production of communications technology solutions for differtent type of land and marine vehicles. This equipment with dual characteristics, combine satellite communications to the AVL databases, using alternately a GSM coverage cellular phone band, or in case of not getting a GSM signal, the communication is done by using the constellation of satellites of the USA Company ORBCOMM Inc. and satellital DS 100 modems from their associate Stellar Satellite Communications Company.