CHINESE TYPE 33G 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. .

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.

China has operated an estimated 84 of the Type-33 submarine (Romeo) during the Cold War. Most have been scrapped, but 13 are still in use for training.

Type 033G: Development of ES5A, with the incorporation of capability to launching acoustic homing torpedo, with analog computers added to achieve automation in order to speed up the calculation of torpedo fire control calculations that was previously requiring manual work. All Chinese Romeos have been converted to this standard. The NATO reporting name for this type is rumored to Wuhan class.

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