The club was founded on 7 August 1945 in Gdańsk and was originally named ""BOP Baltia Gdańsk"". The club was first established by the "Port Reconstruction Office" (). The BOP's purpose was to help rebuild Polish sea ports which were destroyed during World War II, and saw it best to create a sports club for the BOP workers. BOP Baltia's first game came on 2 September 1945, in which they lost the game 6–4 against Milicyjnym Klubem Sportowym z Wrzeszcza (Militia Sports Club from Wrzeszcza). At the end of the season, BOP finished top of their qualifiers, and were promoted to the second division as a result.