WhyMe - thank You very much.
More Polish coast guard patrol vessels below.
First of them was built in Germany as a fishing cutter and in 1949 was impounded by Polish authorities for repeated violations of exclusive economic zone and pressed into service in coast guard as DP-53. Initially it was armed only with machine guns, but shortly after it was armed with - rather strangely located - 37mm universal gun in place of forward mast. In 1950 ship was temporarily renamed "Komuna Paryska". It's service in the coast guard ended in 1959 when it was transferred to one of shipyards as auxiliary unit and renamed "Doker".
Note: due to incomplete data (even its lenght is uncertain), it's underwater part is actually my own creation, also, the 37mm from the templates was hugely oversized and I had to scale it down to 0,8 so it would more-or-less fit where it should.
Next vessel was also built in Germany, in 1944 by Gebr. Kroeger in Warnemünde. After the war it was transferred to Poland by UNRRA and in 1949 entered service as "Celnik I" in Gdynia customs office. In the same year it was transferred to coast guard as DP-54 (temporarily also named "Dzierżyński") where it served until 1965. Then it was transferred to Pańtwowy Instytut Hydrologiczno-Meteorologiczny (State Hydrological and Meteorological Institute) under name "Kra II" and four years later scrapped.
DP-55 and DP-56 were built in late 1949 in Poland as ordinary fishing cutters of the KG-177 class by Stocznia Rybacka (Fishery Shipyard) in Gdynia. After short service in fisheries as "Baca" and "Juhas", they were pressed into coast guard as DP-55 (and temporarily also name "Górnik") and DP-56 respectively, where they both served until 1959. Later DP-55 was renamed "Westerplatte" and served as a training ship in Liga Przyjaciół Żołnierza (League of Friends of Soldier - mass organization of paramilitary character, in 1962 renamed to Liga Obrony Kraju - Homeland Defence League) and in 1976 was again renamed, this time to "Wła 76" and (as the new name suggest) returned to it's original work as fishing cutter. Fate of DP-56 is unknown except for the fact that at some point it was named "Botwin".
Last of this group of ships was built as a tugboat in 1943 in Norway by Kristiansand Mekaniska Verkstad and initially was used by Germans (name unknown). Since 1946 it served as a tugboat in Polish merchant marine under name "Leon". In 1949 it was transferred to coast guard as DP-86 (also temporarily "Tkacz") where it served until 1964. Then it was transferred to Liga Obrony Kraju as training ship "Niedźwiedź", and some years later to Gdynia shipyard as tugboat again, when it was renamed "Bronisław". In 1981 it was rebuilt as pleasure boat, until 1984 for shipyard workers, later as a floating hotel. Since 1998 in private hands. In 2008 it was allegedly sunk in Jastarnia port (act of deliberate vandalism?).