Romanian Danube/Black Sea ports

Sounds like there's work to do and maybe that's what they tried doing not long ago.. 

"these days, Ukrainian and international shipping companies prefer to use smaller vessels that can move along the Black Sea coast towards Romanian ports on the Danube, a gateway to Eastern and Central Europe.

But “the Danube ports are not deep, a Panamax ship [with a tonnage of more than 50,000] won’t enter them, and the cargo needs to be reloaded either at sea or in other ports,” Kyiv-based analyst Aleksey Kushch told Al Jazeera."

Source: https://www.aljazeera.com/news/2023/10/6/they-miscalculated-ukraine-turns-the-tables-on-russias-black-sea-fleet