 The ports of Korsakov and Kholmsk are the largest and handle all kinds of goods, while coal and timber shipments often go through other ports.In 1999, a ferry service was opened between the ports of Korsakov and Wakkanai, Japan, and operated through the autumn of 2015, when service was suspended.For the 2016 summer season, this route will be served by a highspeed catamaran ferry from Singapore named Penguin 33.