The launch of 'DSC A 21', the second ship of 05 x Diving Support Craft (DSC) project, being built by Titagarh Rail Systems Ltd (TRSL), Kolkata for Indian Navy, was undertaken on October 30, 2023 at Titagarh, Kolkata (WB) onto Hooghly River. The Launch Ceremony was presided over by VAdm K. Swaminathan, Chief of Personnel. In keeping with the Naval maritime tradition, Mrs Laila Swaminathan launched the ship.

These ships are designed to undertake diving operations at harbours and coastal waters and are being fitted with state of the art diving equipment. They are 30 m long catamaran hull ships, with a displacement of approx 300 tonnes. The contract for building 05 x Diving Support Craft (DSC) was signed between MoD and Titagarh Rail Systems Ltd (TRSL), Kolkata on February 12, 2021.

These ships are indigenously designed and built under relevant Naval Rules and Regulation of Indian Register of Shipping (IRS). The hydrodynamic analysis/ model testing of the ships during design stage were undertaken at Naval Science and Technological Laboratory (NSTL), Visakhapatnam. These ships are proud flag bearers of 'Make in India' initiative of Government of India (GoI)/ Ministry of the Defence (MoD).