In the preceding two papers on the Waveless Stern (Part I, Part II), the author showed the results of resistance tests together with their theoretical analysis. In this third paper, he deals with the propulsion characteristics of the Waveless Stern. Prior to the tests, the optimum pitch distribution of the wake-adapted propeller was determined as approximately linear according to the usual circulation theory in reference to the wake survey results by the blade wheel method. The tests were carried out with the UNKEN A ₄-40 Standard Propeller with constant pitch distribution ( P/D =1.0) as the said wake adapted propeller. In general, all of the propulsion coefficients take favourable turn with the waveless stern. Summary of the results is given in Figs. 4 and 5. The author also presents the contours and the profile sections for the wave patterns of the stern waves measured and analyzed by the stereophotogrammetry. They prove to be most valuable for clarifying the mechanism of the “waveless” status around the stern.