Heroj-class submarine

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Naval Heritage Collection 04.jpg
Heroj (P-821) in the Porto Montenegro Museum.
Class overview
Builders: Brodogradilište specijalnih objekata (BSO), Split, SR Croatia
Operators: SFR Yugoslav Navy
Preceded by: Sutjeska class
Succeeded by: Sava class
Built: 1964–1970
In commission: 1968–late 1990s
Completed: 3
General characteristics
Displacement: 614 tonnes (604 long tons) (surfaced)
705 tonnes (694 long tons) (submerged)
Length: 50.4 m (165 ft)
Depth: 210 m (690 ft)
Propulsion: 2 × Mercedes diesels (1,600 hp (1,200 kW))
2 × electric motors (1,560 hp (1,160 kW))
Speed: 15.3 kn (28 km/h; 18 mph) (surfaced, maximum)
9.8 knots (18 km/h; 11 mph) (submerged)
Range: 4,100 nmi (7,593 km; 4,718 mi) at 10 knots (19 km/h; 12 mph)
Complement: 55
Armament: 4 × 533 mm (21.0 in) torpedo tubes (6 bow)
10 torpedoes or 20 mines

The Heroj class (eng. Hero) was a class of diesel-electric attack submarines built for the Yugoslav Navy during the 1960s. The three strong class represented a significant improvement compared to the earlier Sutjeska-class. Built at the Brodogradilište specijalnih objekata (eng. Special objects shipyard) in Split, the new class featured a streamlined hull design and four bow facing torpedo tubes that could also be used for minelaying.

With the start of the Croatian War of Independence all three boats were relocated from the Lora Naval Base to Montenegro where they were commissioned with the SR Yugoslav Navy. The last two boats of the class, Junak and Uskok, were decommissioned during the 1990s and scrapped. Heroj was decommissioned in 2004 and after restoration laid up at the Porto Montenegro Museum in 2013.


The boats measured 50.40 m (165 ft 4 in) in length with a hull diameter of 6.68 m (21 ft 11 in). Surfaced they displaced 614 t (604 long tons) and 705 t (694 long tons) while underwater. The diesel-electric drive consisted of two Mercedes diesel generators and single Koncar electric motor mounted on a single shaft. This enabled them a maximum speed of 15.3 knots (28.3 km/h; 17.6 mph) underwater and 9.8 knots (18.1 km/h; 11.3 mph) when surfaced. Travelling underwater using a snorkel at a speed of 10 knots (19 km/h; 12 mph), the boats had a range of 4,100 nmi (7,600 km; 4,700 mi). Diving depth was 210 m (689 ft 0 in). The boats were manned by a complement of 55 crew members.[1]


Name Pennant number[2] Namesake Builder[2] Laid down[3] Launched[3] Commissioned[3] Decommissioned Fate
Heroj P-821 Heroj Brodogradilište specijalnih objekata,
Split, SR Croatia, SFR Yugoslavia
1964 1967 1968 2005/2006 extant; Porto Montenegro museum.
Junak P-822 Junak 1965 1968 1969 1997 scrapped in 1997
Uskok P-823 Uskok 1966 January 1970 1970 1998/1999 scrapped in 2007



Other sources