 When the ship was commissioned on 15 March 1987, "Kaszub" was not fitted with much of the planned armament, with a 9K33 Osa (NATO codename SA-N-4 "Gecko") surface-to-air missile launcher being omitted because of its unreliability on small, high speed ships, while the ship's main gun armament was absent because of stability problems.Originally it was planned to build 7 ships of this class, but in the end only one was constructed.At first, "Kaszub" saw little operational use, being loaned to the Polish Border guard from 1990 to January 1991.