Based on the inter-port data, the inter-island movement of goods is in fact increasing. The
movement between Surabaya-Balikpapan became the largest, followed by the movement
between Surabaya-Jakarta. The inter-island goods transportation data shows that the
movements are generally happening from west Indonesia towards East Indonesia, and viceversa.
Surabaya became an important node because the city is a distributor and collector of
those movements. In comparison to Jakarta, Surabaya has the largest sea modes inter-island
goods movement