The onboard BlueTraker transponder collects vessel positions using GPS satellite signals and sends them together with speed, heading and sensor data to the ®telematic data server.  BlueTraker transponders send data via the GSM (GPRS/SMS) network* when the vessel is within a few miles of shore.  When the boat is on the ®open sea BlueTraker transponders that only have a GSM (GPRS/SMS) option for information delivery store their data in internal memory and transmit them instantly upon GSM signal availability.  All of your processed data is delivered to web based monitoring software.  Each and every important piece of information about the monitored ®vessels is displayed on the map.  BlueTraker transponders offer bidirectional communication to and from the monitoring application allowing the user to view vessel information in real time