Super Kalvari+ Class :- An Alternative Plan For Project P-75I Submarine

In recent times, an interesting proposal related to design selection for Project 75I (P-75I), which is the Indian Navy’s (IN’s) latest programme to acquire six diesel-electric submarines (SSKs) of imported design via license manufacture at a domestic shipyard under the Indian Ministry of Defence’s (MoD’s) new ‘Strategic Partnership’ (SP) policy, has arisen in Indian naval circles. Being a ‘successor’ programme to the Project 75 (P-75) Kalvari Class (Scorpene) build project which is currently underway at the Mazagon Dock Shipbuilders Limited (MDL), the IN has apparently long sought a design for P-75I that is different from the Scorpene-2000 on which the Kalvari Class is based. However, owing to recurrent delays in getting P-75I off the ground, it is now being proposed by some quarters that an enhanced and further indigenized ‘Kalvari Class design’ itself should serve as a template for the project.

With China making rapid increase in its footprint in Indian ocean , Recent reports hint that Navy and Government of India are considering a proposal floated by defence PSU to use Kalvari class submarine as a template to develop a new class of submarine which will replace imported content in the submarine with local alternatives sourced from Nuclear Arihant class project.

Proponents of this view also believe that this would make it easier to execute the anticipated Project 76 (P-76), which is supposed to be an IN program to acquire at least 12 SSKs of indigenous design by leveraging the capabilities built up via the P-75 & P-75I license build programs. It would therefore be worthwhile to examine the merits of the alternative proposal, especially by taking a look at what a similar path has yielded for South Korea.

Logistics Logistics

When envisaging a future IN SSK pool of around two dozen submarines (i.e 6 P-75, 6 P-75I and 12 P-76) essentially based on three different designs, the elephant in the room would of course be the logistical headache that is likely to be an outcome of such a mix. For instance, the weapon fit for these three classes of boats could be different, the naval facilities used for operating & maintaining these boats may also have to be different, and there would always be the issue of not being able to readily transfer trained submariners from one SSK class to another. All of this will naturally increase complexity and entail significant costs. Obviously, all this could be avoided to a great extent if P-75, P-75I and P-76 were more ‘related’ to each other, as it were.

In fact, the license build program for a P-75I that is altogether different from P-75 in any case would lead to additional monetary and time costs as a result of having to prepare the domestic supply chain for a new SSK design. And given that the SP policy seeks to primarily execute P-75I via a private domestic shipyard with no prior experience in SSK construction, a protracted time frame to get the first boat into the water cannot be ruled out either.
So, with all these issues in place, is it worth pursuing P-75I as it is currently envisaged or is the alternative being proposed i.e to continue building Kalvari Class derivatives, a better idea? I believe the alternative proposal holds water and for this we could take a closer look at Seoul’s Korean Attack Submarine program (KSS).

A Korean path for India?

Like in India, KSS also seeks to acquire technology from abroad and then create an indigenous SSK fleet in a step-wise manner that includes three phases. The first phase of KSS (KSS-I) kicked off with the induction of the first Chang Bogo Class submarine in 1993, which was basically a Type-209 built by Germany’s. ROKS Chang Bogo was followed by another eight units of its class, all built in South Korea.Ideally, India should have been able to continue this programme like the South Koreans would do by progressively increasing indigenous content.

In 2007, South Korea would commission the first Son Won-yil Class boat marking the culmination of Phase two of KSS (KSS-II), which involved the acquisition of nine units of an improved version of the Type 209 offered by TKMS called the Type 214. All nine were licence built by Hyundai Heavy Industries (HHI) with the addition of air-independent propulsion (AIP) systems. Thus, if one were to take P-75 as equivalent to KSS-I in import, a KSS-II equivalent design for the IN should naturally be a ‘Super Kalvari’ to be manufactured under P-75I. Such a design should have an increased percentage of indigenous components and sub-systems. For instance the SUBTICS combat management system (CMS) on the Kalvari Class could be replaced with an indigenous CMS derived from the indigenous CMS used by the IN’s Arihant Class nuclear submarines.

The third phase of KSS (KSS-III) seems quite similar to what P-76 seeks to achieve, in that it envisages the construction of an ‘all Korean’ SSK with the design IP residing in South Korea. KSS-III submarines will be completely built in South Korea, with a high percentage of Korean systems as replacements for all original German systems on the Son Won-yil class.
India could also initiate a joint design venture with Naval Group for P-76 in the future. In this manner, an indigenous SSK on par with the best submarines in the world can be developed. It would be able to incorporate a VLS extension, DRDO’s AIP, indigenous weapons and an indigenous CMS; all built exclusively to the IN’s requirements. Obviously, the carrot for Naval Group to help build an ‘indigenous Indian SSK’ would be participation in P-75I just as KSS-II was an incentive for TKMS to agree to KSS-III.

Super Kalvari+ Class

Super Kalvari could also be redesigned to incorporate an indigenous vertical launch system (VLS) to enable submarine fleet to carry Supersonic BrahMos and Sub-sonic Nirbhay Cruise missiles.

Moreover, given that an AIP system developed by the Defence Research & Development Organization (DRDO) is in any case meant to be retrofitted onto the Kalvari Class boats, addition of the same to the Super Kalvari will not be a problem.
Kalvari+ will have higher indigenized content and will have locally developed submarine Sonar suite, periscope and other sub-systems which India can source from Arihant class project. Kalvari+ not only will reduce timeline required to manufacture this six submarines for Indian navy but it also will help Public and Private sector companies to be better prepared to gain experience and expertise before India can initiate Project-76 which is to be executed after Project 75I.

Moreover, in partnership with MDL, a private shipyard could be developed to create a parallel line for SSK manufacture, something that will be utilized to the fullest extent when P-76 takes off. By having two shipyards build the same SSK design in parallel to each other, delays due to equipment sourcing and technology absorption can be mitigated to a great extent, thereby helping the IN reach its goal of acquiring a fleet of at least 24 highly advanced SSK units in a reasonable time frame and in an affordable manner.

Source:- Delhi Defence Review