The discussion centers on calculating the directivity index of an underwater acoustic transducer array using half power beamwidths in both azimuth and elevation planes. Participants suggest that reviewing existing literature and sharing specific findings can help clarify the calculation process. There is also a recommendation to consider parallels with RF antenna arrays, as the mathematical principles may be similar. Engaging with relevant resources and asking targeted questions is encouraged to deepen understanding. Overall, the conversation emphasizes the importance of research and specific inquiries in solving the problem.