I guess I want to know "oceanic" means in this instance. Is that just going out into the ocean a short distance? They mention the "Yangtze River Three Gorges 1" river cruise ship as an example. This thing has a range of like 100km. It seems we are far away from making true oceanic crossings of any long distance and I doubt that is coming by 2028.
East Asia has extensive coastal medium-distance trade. There are so many islands and island nations. That's oceanic trade, but not transatlantic or trans-pacific long hauls.
Islands. As in Japan, Taiwan, Okinawa, Philippines, Malaysia, Indonesia, New Guinea, and for practical purposes, Australia. All of which rely on medium-haul sea traffic.