There are actually comparable distances for the seaports of Hamburg and Szczecin. The latter was "Berlin's port" until 1945, but Cold War neglect and also the newly drawn German-Polish border have all but severed that relationship. There are actually only gradual makes an attempt while in the 2010s and 2020s https://bbcnewsz.de/rum-tasting-berlin-ein-erlebnis-fur-genieser/