Serbia, Ex Yugoslavia, Submarine force
As the Kingdom of Yugoslavia was being formed in 1929, so was Yugoslavia`s submarine force. They inherited three submarines from the Kingdom of Serbs, Croats, and Slovenes. All three of these boats served into World War II, but only Neblosa survive the war and even then she was in an unseaworthy condition.
The People`s Republic of Yugoslavia started its submarine force in 1957 with two small submarines built in Yugoslavia. They are now retired.
The Heroj class was constructed in 1968 with three boats. Two Sava class boats followed in 1978. In 1990 the main combat units of the submarine service were three Heroj class patrol submarines armed with 533-mm torpedoes and two smaller Sava class units. Currently, 2003, only the Sava class is still in service and only one of those is still operational.

had apparently shifted to construction of versatile midget submarines. Five Una class midgets and four Mala class Swimmer Delivery Vehicles (SDV) were in service in the late 1990s. They were built for use by underwater demolition teams and Special Forces. The Una class boats carry six crewmen, four combat swimmers, four Mala vehicles, and limpet mines. The Mala vehicles in turn carry two swimmers and 250 kilograms of mines.
Specifications, Sava class:

The lead boat of the class was laid down in 1975, at S. and DE. Factory in Split; launched 1977 and commissioned as Sava, pennant no. 831, in 1978.

Displacement (srf/sub tons):
Dimensions (L*B*D meter): 55.7*7.2*5.1
Propulsion: diesel-electric,2*Sulzer diesel 1,600hp, 2*generators 1,360hp, 1*main electric motors with 2,040hp, one shaft.
Speed (srf/sub knots): 10/16
Range (srf/sub n/miles@knots): unknown
Diving depth (meter): 300
Complement: 5officers 30 enlisted
Torpedo: 6*21" bow torpedo tubes, total of 10 torpedoes
Mines: 20 in lieu of torpedoes
Armament: none                                                                                                                               
An improved version of the Heroj class, built with USSR electronic equipment and armament.The second of 
class Drava, no. 832, built by the same yard was commissioned in 1981 and was put on reserve in 1998.
Specifications, Una class- midget submarine:
The lead boat of the class was built at S. and DE. Factory in Split; and commissioned as Tisa, pennant no. 911, in May 1985.

Displacement (srf/sub tons):
Dimensions (L*B*D meter): 18.8*2.7*2.5
Propulsion: 2*electric motors 49hp, batteries can only be charged from shore or from a depot ship, one shaft.
Speed (srf/sub knots): 6/7
Range (srf/sub n/miles@knots): unknown/200@4
Diving depth (meter): 120
Complement: 6+ 4 swimmers

Fife units were built under this class; Tisa pennant no.911, Una 912, Zeta 913,Kupa 914 and Vardar 915 all 
commissioned between May 1985 and late 1989. Exit/re-entry capability with mining capacity.
Some of them are probably un operational by now, 2003.

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Image Country Year Description
Serbia & Montenegro 2003 75 Years of Submarine Units in Serbia and Montenegro, 10 Dec' 2003, Prvidan, Beograd
Serbia & Montenegro 2003 Sava class submarine, Sava 831 and Una class,Tisa 911- midget submarine (se-tenant)
Serbia & Montenegro 2003 Sava class submarine, Sava 831
Serbia & Montenegro 2003 75 Years of Submarine Units in Serbia and Montenegro (sheetlet of 9 stamps)
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