Mirna-class patrol boat

A Croatian Navy Mirna (OB-02 Šolta) in the Lora naval base, August 2011
Class overview
Builders:	Tito's Shipyard Kraljevica, Kraljevica, SR Croatia
Preceded by:	Type 131
Succeeded by:	Project OOB 39/42
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:	Two shafts; fixed pitch propellers 2 × SEMT Pielstick diesel engines
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

Mirna-class patrol boat (also known as Type 171) is a class of eleven patrol vessels built for the Yugoslav Navy in the Kraljevica Shipyard from 1979 to 1985. During the Croatian War of Independence and the dissolution of SFR Yugoslavia, most of the vessels were relocated to Montenegro except for four boats that were captured or damaged by Croatian forces and later entered service with the Croatian Navy.

All ship were originally named after mountains in the former Yugoslavia.