Poland’s biggest port, the Port of Gdansk, closely cooperates with the Ukrainian Sea Ports Authority to open up a new alternative transport corridor between the Black Sea and the Baltic. Details of the agreement are being formally unveiled after the MoU was set up during an official visit to Ukraine by the Polish President Andrzej Duda in October 2020.
https://www.portgdansk.pl/en/events/...-with-ukraine/

but maybe also this?
Quote Originally Posted by Veljo View Post
Plans for Waterway From Baltic to Black Sea via Ukraine, Belarus and Poland Advance

https://jamestown.org/program/plans-...oland-advance/