As of December 2020[update], the Navy's sub-surface fleet includes one nuclear-powered attack submarine, one ballistic missile submarine, 15 conventionally-powered attack submarines.[187] The conventional attack submarines of the Indian Navy consist of the Kalvari (French Scorpène-class submarine design), the Sindhughosh (Russian Kilo-class submarine design) and the Shishumar (German Type 209/1500 design) classes.[188][189][190]