Charts. Gdynia, Poland. Gdynia, Port and Roadstead, Poland, Baltic Sea, from Polish surveys to 1932, with additions to 1936, scale 1,500 yds.=3.6 in., natural scale 1:15,000; Neufahrwasser and Danzig, Free State of Danzig, Baltic Sea, from various sources to 1933, scale naut. m.=2.5 in., natural scale 1:30,000; chart 4928.