The K-8 class was a minesweeper first manufactured by Poland for the Soviet Navy in 1954.
Those minesweepers replaced a variety of minesweepers that had been used during World War II. This gave the navy an inexpensive ship to clear mines from its harbors in case of a war with NATO and the West. A wooden hull negated the effects of magnetic mines, and the vessels towed minesweeping gear behind them. However, vessels had no equipment for actually handling mines aboard ship.
A total of forty vessels were completed. The TR-40 minesweeper slowly replaced the K-8s in Soviet service, but the vessels were transferred to foreign navies such as Poland, Cuba and Vietnam. Designated Project 361T, a handful of K-8 boats were converted to mine warfare drones but saw limited service. The survivors were put into reserve until being struck from the record in the early 1980s.