Ferries are good in Croatia. There's always a ticket office by the ports if not booked, just get there early. Not all ferries are ro-ro either. Good vids as always ☺
Some lines about the Tin Ujević ferry itself: it was built in Greece in September 2002, but in summer 2003 (not even a year old) bought by Jadrolinija, originally for the Split - Stari Grad (Hvar island) route. Since then, the passenger volume on both Supetar and Stari Grad routes rose significantly. Ujević as one of the biggest "local" ferries of Jadrolinija was transferred to Supetar route, while the even busier Stari Grad route is now usually operated by high-capacity former international ferry Zadar, and another ex-Greek Faros. The other ferry Marjan is a sister ship to Hrvat, and both belong to the group of 5 bigger ferries (1200 pax, 135 cars) built around 2005 in Kraljevica, Croatia. So these home-made ships. The other three are Jadran, Juraj Dalmatinac and Biokovo. They operate on various crossings in Dalmatia, taken over from previous much smaller ships. For example: in 2002 (when I was first there) the Supetar line was operated by ferries Vladimir Nazor (450 pax, 70 cars max.) and Valun (730 pax, 60 cars max). Both are still in fleet, but transferred to other less busy lines.