The tests reported here covers acoustic emission measurements on a typical model scale set-up with a model propeller in behind condition on a hull model in the cavitation tunnel. This report is the final report from three rounds of tests. This project has shown that with an AE-sensor, a correlation between the distribution of AE peak amplitudes and the cavitation volume and intensity can be established. Thus, the method can detect potentially erosive cavitation. However, whether the cavitation implodes on the blade surface and cause erosion or if it collapses slightly off the Surface with no erosion cannot yet be distinguished. The paint test is still the best option to distinguish this. More work needs to be done on analysis of the recorded data to see if we can differentiate erosive cavitation from potentially erosive cavitation. Another question is if we can achieve similar results with sensors not mounted on the rotating shaft; either with high-frequency pressure transducers in our standard pressure transducer positions above the propeller or by accelerometers mounted on the shaft-line supports. This would simplify the set-up significantly.