# Mirna-class patrol boat

The Mirna class (referred to as the Type 171 in some sources) is a class of eleven patrol boats built for the Yugoslav Navy (Serbo-Croatian: Jugoslavenska ratna mornarica - JRM) by the Tito's Kraljevica Shipyard. Intended as a replacement for the earlier Type 131 boats, the new class was completed during the early 1980s and commissioned in the JRM Maritime Border Brigade.
Following the outbreak of the Croatian War of Independence, two boats were damaged and subsequently captured by Croatian forces, while another two were captured in the Šibenik Shipyard during the Battle of the Barracks. All four were commissioned in the Croatian Navy and are in active service as of 2017. The remaining seven boats were relocated to Boka Kotorska where they became part of the Navy of FR Yugoslavia. All seven were decommissioned during the early 2000s: two were handed over to the Ministry of Interior and scrapped in 2012 after seeing little service, while the remaining five were sold off to civilian owners.

## Boats

| Name (original) | Pennant number (original) | Launched | Status |
| Biokovo | PČ-171 | 1980 | Damaged off Škarda by a 9K11 Malyutka missile fired by Croatian naval personnel landed from an armed motor boat and a schooner anchored at a cove in the island on 10 September 1991, limped to Mali Lošinj. Later captured by the Croatian Navy. In operational use as OB-01 Novigrad. Located at Lora Naval Base in Split. |
| Pohorje | PČ-172 | 1981 | Relocated to Montenegro. Sold to a private owner who uses it as a tourist ship. |
| Koprivnik | PČ-173 | 1981 | Shelled Šibenik on 17 September 1991, during the Serb assault on the city. Relocated to Montenegro. Sold to a private owner who uses it as a tourist ship. |
| Učka | PČ-174 | 1982 | Relocated to Montenegro. Transferred to the Ministry of Interior Affairs in 2003 and used by the Naval police since 2005 under the name P-01 Bar. Sold for scrap in 2012. |
| Grmeč | PČ-175 | 1982 | Relocated to Montenegro. Sold to a private owner from Biograd, Croatia who uses it as a tourist ship. |
| Mukos | PČ-176 | 1983 | Captured by Croatian forces after being hit by Croatian naval commandos with an improvised torpedo off Brač during the battle of the Dalmatian Channels, on 14 November 1991. In service with the Croatian Navy as OB-02 Šolta. |
| Fruška Gora | PČ-177 | 1983 | Relocated to Montenegro. Sold to a private owner who uses it as a tourist ship. |
| Kosmaj | PČ-178 | 1983 | Intercepted and sank a fishing motorboat carrying six Croatian naval commandos in a sabotage mission off Šipan island on 23 October 1991. Only one of the commandos survived. Relocated to Montenegro. Transferred to the Ministry of Interior Affairs in 2003 and used by the Naval police since 2005 under the name P-03 Herceg Novi. Sold for scrap in 2012. |
| Zelengora | PČ-179 | 1983 | Relocated to Montenegro. Sold to a private owner from Croatia in 2007 who uses it as a tourist ship Iliria. |
| Cer | PČ-180 | 1984 | Shelled Šibenik on 17 September 1991, during the Serb assault on the city. Relocated to Montenegro. Captured by Croatian forces. In service with the Croatian Navy as OB-03 Cavtat. |
| Durmitor | PČ-181 | 1985 | Captured by Croatian forces. In service with the Croatian Navy as OB-04 Hrvatska Kostajnica. |