There has to be a minimum of two cameras for the VGJ-system, one over each goal. These cameras have to be mounted approx. 50cm in front of the goal line. As Figure 2.1 shows, the cameras have to be mounted in such way that the most of the area in front of the net is covered on the video. Figure 2.2 shows how the cameras should NOT be mounted.

Figure 2.1: Correct mounting of the VGJ cameras		Figure 2.2: Wrong mounting of the VGJ cameras