The Soviet coastal submarines building program according to a CIA report dated 7 January 1955

An item reports that the Soviet navy possessed a total of 130 short range submarines of which 35 were considered as obsolete and 47 inactive. The building program of the Soviet Union possible included additional transfer of coastal submarines to Eastern Bloc countries with sea borders.

Source
The report was published on www.archive.org, document number CIA-RDP91T01172R000200020001-8