Which is the southernmost major port of India?

Tuticorin Port (also known as V.O. Chidambaranar Port) is India's southernmost major port, located in Tamil Nadu. It was declared a major port on July 11, 1974, and has since become the second-largest port in Tamil Nadu and the fourth-largest container terminal in India. The other ports mentioned—Chennai, Mangaluru, and Kochi—are all situated further north along India's coastline. Chennai Port is the largest port in the Bay of Bengal, Mangaluru Port is Karnataka's only major port, and Kochi Port is known for its historical significance in spice trade.