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.

Šolta (OB-02) photographed in the Lora Naval Base, August 2011
Class overview
Builders: Tito's Shipyard Kraljevica, Kraljevica, SR Croatia
Operators:
Preceded by: Type 131
Succeeded by: Project OOB 39/42
Completed: 11
Active: 4
General characteristics
Displacement:
  • Standard: 125 t (123 long tons)
  • Full load: 142 t (140 long tons)
Length: 33.4 m (109 ft 7 in)
Beam: 6.74 m (22 ft 1 in)
Draught: 2.3 m (7 ft 7 in)
Propulsion:
Speed:
  • 32 knots (59 km/h)
  • 24 knots (44 km/h) (economical)
Range: 600 nm at 15 knots
Complement: ~ 20
Armament:
  • 1 × Bofors 40 mm (1.6 in) gun
  • 1 × Hispano M-75 four-barreled 20 mm (0.79 in) gun
  • 1 × MTU-4 9K32M Strela-2M
  • 2 × double-barreled 128 mm (5.0 in) illuminator launchers

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[2] Damaged by a 9K11 Malyutka missile fired by Croatian armed fishing boats off Škarda island[3] on 10 September 1991,[4] limped to Mali Lošinj.[3] Later captured by the Croatian Navy at Žirje island, off Šibenik.[3] In operational use as OB-01 Novigrad. Located at Lora Naval Base in Split.
Pohorje
PČ-172
 1981[2] Relocated to Montenegro. Sold to a private owner who uses it as a tourist ship.
Koprivnik
PČ-173
 1981[2] Relocated to Montenegro. Sold to a private owner who uses it as a tourist ship.
Učka
PČ-174
 1982[2] 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.[5]
Grmeč
PČ-175
 1982[2] Relocated to Montenegro. Sold to a private owner from Biograd, Croatia who uses it as a tourist ship.
Mukos
PČ-176
 1983[2] Captured by Croatian forces after being hit 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[2] Relocated to Montenegro. Sold to a private owner who uses it as a tourist ship.
Kosmaj
PČ-178
 1983[2] 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.[5]
Zelengora
PČ-179
 1983[2] Relocated to Montenegro. Sold to a private owner from Croatia in 2007 who uses it as a tourist ship Iliria.
Cer
PČ-180
 1984[2] Captured by Croatian forces. In service with the Croatian Navy as OB-03 Cavtat.
Durmitor
PČ-181
 1985[2] Captured by Croatian forces. In service with the Croatian Navy as OB-04 Hrvatska Kostajnica.
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References
  1. "Vessel Design and Development - Fast Patrol Craft Mirna" (PDF). hrbi.hr. Archived from the original (PDF) on 24 September 2015. Retrieved 12 November 2013.
  2. "Kraljevica - Reference list". hb.hr via web.archive.org. Archived from the original on November 23, 2010. Retrieved 12 November 2013.CS1 maint: unfit url (link)
  3. Udruga Dragovoljaca Hrvastke Ratne Mornarice - Zadar (in Croatian)
  4. Zdenko Vidov: Izgleda kao da je netko namjerno kočio stvaranje odreda (in Croatian)
  5. "Dva najveća plovila policije idu u staro željezo". pomorac.net (in Croatian). September 11, 2012. Archived from the original on 12 November 2013. Retrieved 12 November 2013.
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