Mornar-class patrol boat

The "Mornar" class consisted of two large patrol boats built for the Yugoslav Navy ( – JRM) by the Tito's Shipyard in Kraljevica during the late 1950s and early 1960s. The boats were based on the "Udarnik" (PBR-581), a French-built "Le Fougueux"-class submarine chaser acquired in 1956. Both boats had an uneventful career and were deleted in 1992.
Description and construction.
The "Mornar" class consisted of just two boats: "Mornar" (PBR-551) which was laid down in 1957, launched in 1958 and commissioned on 10 September 1959, followed by "Borac" (PBR-552) which was laid down in 1964 and launched and commissioned in 1965. The class was based on the "Udarnik" (PBR-581), a French-built submarine chaser of the "Le Fougueux"-class, which was acquired by Yugoslavia in 1956.
The boats measured in length with a beam and a draught of . Standard displacement measured while fully loaded they displaced . Propulsion consisted of four SEMT Pielstick PA17V diesel engines powering two shafts for a total of power output of , enabling a speed of and range of at or at .
Their original gun armament consisted of two 3"/50 caliber guns, two single-barrelled guns and two single-barrelled guns. Anti-submarine weapons consisted of two Mark 6 depth charge (DC) throwers and two Mark 9 DC racks. Both boats were modernized during 1970/73 at the "Sava Kovačević" Naval Repair Yard in Tivat; their 76 mm guns were removed and four five-barrelled Soviet-built RBU-1200 were installed along with a Tamir-11 sonar.
Service history.
The boats enjoyed a long, albeit uneventful, career in the Yugoslav Navy and both were deleted in 1992.