WhyMe -
Some small (VERY small) boats below (maybe even TOO small to be done well).
First one was built in 1931 in Modlin Shipyard for customs office in Gdynia as Skarbówka. It's wartime history is basically unknown. After the war it returned to service as customs boat, renamed Celnik II. In 1950 she was transferred to Coast Guard and eventually renamed KP-2. It served there until 1959 when it was transferred to Liga Przyjaciół Żołnierza/Liga Obrony Kraju. Now it seems to be in private hands and it's owner attempts to restore her to original shape (or at least it was so 2 years ago).
Next boat is younger and bigger (1,2m longer) sibling of Skarbówka/KP-2. Three such boats - Kaszub, Mazur and Ślązak were built in Modlin in 1931-1932 for the Border Guard Flotilla where they served alongside Batory (mentioned before). Ślązak was sunk on the first day of war and other two were captured by the Germans after the fall of Poland in 1939. In 1947 they were found in Germany in British Sector of Occupation. Mazur was lost in storm during repatriation while Kaszub was repaired and in 1949 entered service in Coast Guard as Starówka and after reorganization KP-3. In 1959 it was decommissioned and scrapped.
Boat below entered Polish service after it was removed (together with its twin sister) from the wreck of German battlecruiser Gneisenau. After necessary repairs it was commissioned in 1950 in Coast Guard as Sława, later renamed KP-5, later KP-72. It was decommissioned in 1963 (and most likely scrapped). Other boat served until 1956 in the Navy as hydrographical boat named Sonda.
Boats KP-32, KP-33 and KP-34 were built in years 1947-1948 in Ustka shipyard as fishing cutters and around 1949 transferred to Coast Guard - initally as Hübner, Kniewski and Rutkowski and later as KP-32, KP-33 and KP-34 respectively. They served until 1959 when KP-33 and KP-34 were transferred to Liga Przyjaciół Żołnierza/Liga Obrony Kraju.
Drawing below shows fishing cutters built in 1947 in Darłowo shipyard and put into service in the Coast Guard as KP-61 to KP-64. Similarly to KP-32/33/34, they served until 1959 and KP-61 and KP-62 were later transferred to Liga Przyjaciół Żołnierza/Liga Obrony Kraju.
Last drawing for today shows LCP(L) landing craft. 19 such boats were obtained in 1947 by Polish Navy, 6 of them were used in their designed tasks (units with open hull), while 13 (with closed superstructure) were transferred to Coast Guard which used them until 1960. 7 of them were transferred to Liga Przyjaciół Żołnierza/Liga Obrony Kraju.
Note: I have deliberately made this drawing with non-standard railings. I can change it if someone from the Forum's leadership will threaten me with a keelhauling, but I hope it won't be necessary, as standard railings would change it's looks quite considerably.
In the late 1940s and early 1950s Polish Coast Guard used large numbers of small boats, fishing cutters etc. Some of them for a very short period of time only. Exact information about them are scarce at best, and very often virtually nonexistent.