Danziger Bucht
Lieutenant Commander Kazimierz Miładowski was the captain of the ship during the September campaign. On 26 or 27 August "Rybitwa", which together with two other Polish ships had been stationed in Riga, Latvia, left for Gdynia, along with on full combat alert. After arriving in Gdynia she conducted reconnaissance operations in Gdańsk Bay, between the Free City of Danzig and the East Prussian coast. On 1 September 1939, after the outbreak of the Second World War, "Rybitwa" and all other 5 minesweepers of her class joined with the minelayer and took part in the "Operation Rurka", an attempt to mine the entrances of the Gdańsk Bay.