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- Akula-class submarines are considered one of the most silent SSNs in service and are capable of sailing at speeds up to 35 knots.
- They are nuclear powered but are armed with conventional land attack missiles
- India had earlier leased first Akula-II class nuclear attack submarine (SSN) for a period of 10 years from Russia.
- It was inducted into service as INS Chakra (formerly known as K-152 Nerpa) in April 2012. Its lease expires in 2021
- Now, India has signed agreement with Russia to lease second Akula-II class nuclear attack submarine (SSN)