Project Kalina is a proposed fifth-generation diesel-electric submarine currently being developed by TsKB Rubin and others, for the Russian Navy.

It will be fitted with air-independent propulsion technology, and copies may also be sold to China.

[1][2][3] As of 2021, the project had lost government funding, according to the Russian state-owned RIA Novosti news agency.

As a result, it was being self-funded by Rubin, the developer.

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