You will find very similar distances to your seaports of Hamburg and Szczecin. The latter was "Berlin's port" right until 1945, but Chilly War neglect plus the freshly drawn German-Polish border have all but severed that relationship. There are actually only sluggish attempts during the 2010s and 2020s to re-create https://andyuazei.wikijournalist.com/4800220/berlin_an_overview