The Nistar class is a series of two diving support vessels being built by Hindustan Shipyard (HSL) for the Indian Navy.

To aid in its submarine operation, the Indian Navy signed a contract with the Hindustan Shipyard (HSL) to indigenously design, develop and manufacture these ships on 20 September 2018.

[13] The contract obligated the shipyard to deliver the ships within 36 months from signing the deal but there has been considerably delays owing to the COVID-19 pandemic and subsequent lock down in India.

Owing to this delay, the Indian Navy has released a Request for Information (RFI) to lease a mother ship to operate their deep-submergence rescue vehicle (DSRV).

[14] The ship will have at least 80% indigenous content contributing significantly to the Atmanirbhar Bharat mission of the Government of India and further bolstered the Indian economy.

The diving support vessels (DSVs) are first of the kind ship, indigenously designed and built at HSL for the Indian Navy.