Diving Support Craft (DSC) are a series of 5 small-category diving support vessels being built for the Indian Navy by Titagarh Rail Systems Limited.
The ships are designed and equipped with state-of-the-art apparatus to support diving operations in coastal under water environment. The vessels are designed to meet the mission needs of Command Clearance Diving Teams (CCDTs). A contract worth was signed between Titagarh Rail Systems Limited (TRSL) and the Indian Navy on 12 February 2021. Diving support vessels are important for both military and commercial diving. They are used for underwater work such as inspecting and maintaining pipelines, well-heads, and mobile platforms. They will be used for providing diving assistance to all ships inside and close to harbour for underwater repair, maintenance and salvage.
The ships have been indigenously designed and the systems were tested at Naval Science and Technological Laboratory (NSTL) of DRDO. They are 30 m long catamaran hull ships, with a displacement of around 380 tons. The ships are designed with a two-man Re-Compression Chamber (RCC).
The first ship, DSC A20, was delivered on 18 September 2025. DSC A20 was commissioned on 16 December 2025 at Naval Base, Kochi which will also be its homeport under the Southern Naval Command. It was the 11th ship of the Navy commissioned in the year.