The major port in the state is at Kochi, which has an area of 8.27 km2.[41] The Vizhinjam International Seaport, which is currently classified as an intermediate port, is an upcoming major port under construction.[41] Other intermediate ports include Beypore, Kollam, and Azheekal.[41] The remaining ports are classified as minor which include Manjeshwaram, Kasaragod, Nileshwaram, Kannur, Thalassery, Vadakara, Ponnani, Munambam, Manakodam, Alappuzha, Kayamkulam, Neendakara, and Valiyathura.[41] The Kerala Maritime Institute is headquartered at Neendakara, which has an additional subcentre at Kodungallur too.[41] The state has numerous backwaters, which are used for commercial inland navigation.