Why DRDO Leading P-76 Submarine Design When Indian Navy Has Its Own Submarine Design Group, Asks Retd Vice Admiral

Why DRDO Leading P-76 Submarine Design When Indian Navy Has Its Own Submarine Design Group, Asks Retd Vice Admiral


A former high-ranking officer in the Indian Navy has raised concerns about the Defence Research and Development Organisation's (DRDO) role in a major submarine project, questioning whether it duplicates existing capabilities within the Navy itself. Vice Admiral (Retd) K.N.

Sushil, a veteran submariner and former Commander-in-Chief of the Southern Naval Command, publicly questioned the necessity of DRDO leading the design of new submarines under Project-76.

Project-76 is a significant initiative to build six advanced diesel-electric submarines for the Indian Navy. The project is expected to receive final approval from the Cabinet Committee on Security (CCS) by April 2025.

DRDO claims these submarines will be 90-95% indigenous, displacing between 3,000 and 4,000 tons, and feature cutting-edge technologies. These are anticipated to include DRDO's own phosphoric acid fuel cell based Air-Independent Propulsion (AIP) system for extended underwater endurance, lithium-ion batteries, pump-jet propulsion for quieter operation, and potentially Vertical Launch Systems (VLS) to fire cruise missiles.

DRDO aims to complete the design by 2028, with the first submarine entering service around 2033-34. This timeline is crucial for the Navy, which seeks to modernize its fleet to address the growing naval capabilities of China and Pakistan.

Vice Admiral Sushil's primary concern centers on the Navy's own Submarine Design Group (SDG), a specialized unit within the Directorate of Naval Design (DND).

The DND, the Indian Navy's in-house design organization, has a long and successful history, having designed over 19 classes of warships since the 1960s. These include major vessels like the Shivalik-class frigates, Kolkata-class destroyers, and the aircraft carrier INS Vikrant.

The SDG specifically focuses on submarine design. Even the Arihant-class nuclear submarines, a DRDO-led project, relied significantly on the SDG's expertise in hull design and hydrodynamics, as acknowledged in a 2016 Ministry of Defence (MoD) report.

Sushil also questioned the procedural aspects of Project-76. He pointed out that if DRDO possesses the claimed design capabilities, it is unclear why a separate design approval phase, requiring CCS sanction, is necessary.

The Project-76 timeline allocates three years for design finalization, a duration typical for naval design projects. However, DRDO's process involves external validation, a step not typically required for designs originating from the SDG, which operates within a streamlined Navy-MoD approval process.

The underlying issue, as highlighted by the retired Vice Admiral, appears to be potential overlap and inefficient use of resources. DRDO's involvement in submarine design, with reports of the project budget potentially reaching ₹10,000 crore (approximately $1.2 billion USD), is seen by some as redundant, given the Navy's existing in-house expertise.

Critics suggest that consolidating efforts under the SDG could potentially expedite Project-76 and avoid duplication. The debate raises broader questions about the optimal allocation of resources and responsibilities within India's defence establishment.
 
If the navy is so adept in designing subs, then why is it buying subs from France and Germany?

I think DRDO had a good hang of sub design from the Arihant design experience and wants to extend it to conventional subs. Today, we have AIP and all the ingredients for sub building. We will import the diesel engine from MTU Germany and a few other systems and get the sub in place.
 
The DRDO design bureau and Naval submarine shipbuilding design teams must be merged and made to work in unison, pooling their strengths and technical power and sharing resources instead of competing against each other.
 
Defence.in article says that DRDO led the Advanced Technology Vessel (ATV) project or Arihant-class design [though it involved institutions like Submarine Design Group]. Another The Hindu article states Project-75I is an extension of ATV project. I think this solves the confusion. The cluster of designers and designation is same and no doubt involves SDG and WDB.

Moreover, I think P75I SSKs will be kind of scaled down Arihant-class design with diesel-electric propulsion coupled with AIP and could also inherit 4-8 VLS launchers for cruise missiles. Further, two shipbuilders (likely MDL and L&T) should be included to simultaneously manufacture 12 subs under P75I.
 
Any Pvt. company can design a weapon system. However, having a liaison with the user, in this case, the IN, does make sense. In the case of DRDO, being a government body, it is prudent that they be in close liaison with the IN, who are the main users of the system. Trying to work in isolation without the involvement of the IN is totally surprising.
 
They have to enter everywhere... every time they give a timeline of 10 years which gets revised every 2 years... like Kaveri, AMCA...

Hey, if you have AIP and pump jet tech then use it in Scorpene and nuclear subs... DRDO needs reforms... they should focus only on niche and core tech...
 
Defence.in article says that DRDO led the Advanced Technology Vessel (ATV) project or Arihant-class design [though it involved institutions like Submarine Design Group]. Another The Hindu article states Project-75I is an extension of ATV project. I think this solves the confusion. The cluster of designers and designation is same and no doubt involves SDG and WDB.

Moreover, I think P75I SSKs will be kind of scaled down Arihant-class design with diesel-electric propulsion coupled with AIP and could also inherit 4-8 VLS launchers for cruise missiles. Further, two shipbuilders (likely MDL and L&T) should be included to simultaneously manufacture 12 subs under P75I.
My suggestion is to build a consortium of SDG + DRDO + MDL for the P-76.

Model the P-76 directly on the German Type-214NG (P-75I) instead of the outdated Arihant.

Add a pumpjet instead of the propeller of the Type-214NG.

Go for a full silicon-carbide battery setup instead of an AIP + Li-ion battery setup for enhanced stealth + endurance like theJapanese Soryu SSKs.
 
Navy shall issue the major functional features and specifications to DRDO. The user always has an upper role. DRDO shall only be a vendor for the design and analysis.
 
Is the Indian Navy a fighting force or engineering division? No harm in providing advice to designers, but becoming a design company in itself is wrong utilization of the force. You can transfer the engineering division to DRDO, and the Navy can focus on its core duty.
 
Why is he complaining about it now when they are almost complete and permission will be given to start construction soon?

Why they wanted to use DRDO isn’t clear but there could have been staff shortages within the navy’s design organisation.
 
The DRDO design bureau and Naval submarine shipbuilding design teams must be merged and made to work in unison, pooling their strengths and technical power and sharing resources instead of competing against each other.
Absolutely not. If possible, other than the ballistic missile department, shut everything else.
 

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