Romeo-class submarine

The Project 633 class (known in the West by its NATO reporting name as the Romeo class) is a class of Soviet diesel-electric submarine, built in the 1950s. At the end of World War II, the Soviets obtained several Type XXIs, from which they were able to obtain certain key technologies. These technologies assisted in the design of the Zulu- and Whiskey-class. Further improvements on the design led to the Romeo class, which was designed by Lazurit Central Design Bureau ("Lazurit" is the Russian word for lazurite).

Only 20 of the Soviet Union's originally intended 56 were completed between October 1957 and the end of December 1961 because of the introduction of the nuclear submarine into the Soviet Navy.

By today's standards Romeo class submarines are considered obsolete, but they still have some value as training and surveillance vessels.

Country Name Origin Year
China 1950
Country Name Operational Year Retirement Year
Bulgaria 1961 View
China 1961 View
Egypt 1961 View
Korea 1961 View
Russia (USSR) 1961 View
Syria 1961 View

Class overview
Builders: Krasnoye Sormovo Shipyard, Gorky
Wuchang Shipyard (Wuhan)
Guangzhou Shipyard (Canton)
Jiangnan Shipyard (Shanghai)
Bohai Shipyard (Huludao)
Mayang-do Naval Shipyard (North Korea) - Assembly site of North Korean kits from China.
Operators:  Soviet Navy
 People's Liberation Army Navy
 Korean People's Navy
 Bulgarian Navy
 Syrian Navy
 Egyptian Navy
Preceded by: Whiskey class submarine
Succeeded by: Foxtrot class submarine
Building: 20
Completed: 133
Retired: 75
General characteristics
Displacement: 1,475 tons surfaced
1,830 tons submerged
Length: 76.6 m (251 ft 3 in)
Beam: 6.7 m (22 ft)
Draught: 5.2 m (17 ft 1 in)
Propulsion: Two diesels delivering 2.94 MW (4000 shp) with two electric motors driving two shafts.
Speed: 15.2 knots surfaced
13 knots submerged
Range: 14,484km (9,000 miles) at 9 knots
Complement: 54 men (10 officers)
Sensors and
processing systems:
sonar and radar
Electronic warfare
and decoys:
MRP 11-14
Armament: 8 × 533mm (21in) torpedo tubes. Six located in the bows and two in the stern.
14 × 533mm (21in) anti ship or anti submarine torpedoes (including Yu-4 and Yu-1 torpedoes) or 28 mines

End notes