Shipping has greatly increased Underwater Radiated Noise (URN) in recent decades, impacting marine species reliant on sound. The IMO issued guidelines in 2014, recently revised, to reduce shipping noise, emphasizing propellers as key contributors. Therefore, test and predict noise generated by propellers is paramount. This study acoustically characterizes the atmospheric towing tank of the Polytechnic University of Madrid, assessing noise propagation and background sources. Results indicate that despite reverberation, reliable measurements are possible. Furthermore, noise measurements of a five-bladed propeller were conducted. While design rotation rates yield weak signals, conditions like zero thrust or ventilation allow accurate acoustic assessments, suggesting towing tanks can be effective for certain operational scenarios.