Technology for the real time measurement of mechanical data from a javelin throw has been developed. The javelin is instrumented with an ineartial measurement unit measuring, IMU, acceleration, angle speed and direction to the earth magnetic field all in three dimensions i.e. in total nine parameters. The IMU is buildt into the javelin still maintaining the javelin properties and keeping it within the IAAF specifications. The instrumentation is build using the EIS architecture thus incorporating TCP/IP support including an Internet server. The wireless communication technology choosen is Bluetooth that connects to Internet through either a Bluetooth enabled mobile phone or a stationary Bluetooth accesspoint