Arihant-class SSBN - News & Discussions

RISING SUN

Senior member
Dec 3, 2017
10,161
5,186
This is either INS Arihant (SSBN 80) or INS Arighat (SSBN 81). They are both identical so impossible to know from sat pics :
View attachment 20394

This is the S4 submarine. It has 1000 tons more displacement than the 1st two submarine of its class. The S4 is supposed to be launched this year. The last sub (called S4*) is still being constructed inside the shed.
View attachment 20393
This photo is there from at least 1.5 years and yet to updated. And in between a new shed has come up further south east side towards open ocean direction. In present scenario I can find 5 places where SSN/SSBN can be berthed while three sheds are clearly avaiable, 2 seems to fixed and empty (supposedly) while Arihant is in open and Arighat is partially visible. Another thing to note SSBN housing site seems to be functioning now as entrance tunnel is deeply mixed with terrain hence difficult to spot for untrained eyes and a ship is always parked in channel to either anchor a blocking wire or clearing of the channel.
 
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Gautam

Team StratFront
Feb 16, 2019
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Tripura, NE, India
This photo is there from at least 1.5 years and yet to updated.
The photos here are old, but not that old. Check post #279 on this thread. The dates marked on that post are dates I took those photos, not actual dates when the photos were captured by satellites. You will see a lot of changes in the last 1.5 years.
And in between a new shed has come up further south east side towards open ocean direction. In present scenario I can find 5 places where SSN/SSBN can be berthed while three sheds are clearly avaiable, 2 seems to fixed and empty (supposedly) while Arihant is in open and Arighat is partially visible. Another thing to note SSBN housing site seems to be functioning now as entrance tunnel is deeply mixed with terrain hence difficult to spot for untrained eyes and a ship is always parked in channel to either anchor a blocking wire or clearing of the channel.
Alright I have heard some similar things. But these are just speculations, so believe at your own risk.

I have heard that L&T has completed building at least one of the S5 class SSBN's hull. The hull was built at Hazira port & transported to SBC, Vizag. At the SBC the hull is kept at some underground facility. Documents from BARC suggests that the development of a ~190 MWe nuclear reactor code named CLWR-B2 is complete. BARC is now fabricating the reactor after which it will be assembled onto the S5 hull inside the underground facility.

CLWR-B2 stands for Compact Light Water Reactor-B2. The 83 MWe reactor was named CLWR-B1.
 

RISING SUN

Senior member
Dec 3, 2017
10,161
5,186
The photos here are old, but not that old. Check post #279 on this thread. The dates marked on that thread are dates I took those photos, not actual dates when the photos were captured by satellites. You will see a lot of changes in the last 1.5 years.

Alright I have heard some similar things. But these are just speculations, so believe at your own risk.

I have heard that L&T has completed building at least one of the S5 class SSBN's hull. The hull was built at Hazira port & transported to SBC, Vizag. At the SBC the hull is kept at some underground facility. Documents from BARC suggests that the development of a ~190 MWe nuclear reactor code named CLWR-B2 is complete. BARC is now fabricating the reactor after which it will be assembled onto the S5 hull inside the underground facility.

CLWR-B2 stands for Compact Light Water Reactor-B2. The 83 MWe reactor was named CLWR-B1.
Post 279 is actually matching with my post. Just to clarify more what I was intending to say was that there is no difference in visual sighting of boats and no 3rd boat is seen since 2nd boat was visually sighted since at least 1.5 years and we can see full Arihant boat and partial Arighat boat if that it is. Further Akula is also not seen since the same time frame roughly. Last time it was seen was just around Galwan incident. What you're saying the movement of cover over the boat, not the visual sighting of the boats, right? If that's what you're saying then we are on same page.
 

Gautam

Team StratFront
Feb 16, 2019
12,536
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Tripura, NE, India
What you're saying the movement of cover over the boat, not the visual sighting of the boats, right? If that's what you're saying then we are on same page.
Yep that's what I meant. Movement of cover & at times movement of one of the subs. Its always 2 SSBNs, no more no less. One of the subs is always a bit bigger. This pic shows 2 subs side by side :
1627840325254.png


In a normal submarine building cycle, covers are removed at the end of the outfitting work. This is because you would need a crane to arm the sub with SLBMs & cranes can't work with covers on. In post #279 & the pic above you will see that the covers are completely removed suggesting the sub is ready for sea trials. But in the pics I posted today (#299) shows the cover is back on. Wonder if they are 2 different subs. Maybe the larger uncovered sub seen above is the S4 & the covered sub on #299 the S4*.
 

Arctic Wolf

Member
Sep 7, 2021
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Odisha
This maybe an unrelated post - but is there any known update on the S5-class SSBN? Is it an actual, existing project or was it a creation of the media?
 

Tatvamasi

Well-Known member
Jan 5, 2018
884
856
India
This maybe an unrelated post - but is there any known update on the S5-class SSBN? Is it an actual, existing project or was it a creation of the media?
The project exists but won't be realized anywhere soon. The ambition is to build 12k+ ton SSBN. For that new yard is needed. S3 is close to induction while S4 and S4* are in advanced stages of construction. So S5 will break cover only in the 2030s.

I hope first SSN will enter the water at the same time. Both could even have the same reactor.
 

AbRaj

Senior member
Dec 6, 2017
2,009
1,477
Republic of Wadiya
IN has always been way ahead of its counterparts in laying down NQRs and also stick to them. India is in a unique position compared to anyother nation when its comes to IOR. Just the way we have Himalayas which offer certain amount of natural defense, similarly the entry points to IOR are such that we ca choke them with least effort including for subs. The biggest threat to a SSBM sub is a SSN sub. USSR had created Akula class as the escort subs for their bigger SSBNs to hunt and destroy the enemy SSNs. In our case for next 100 yrs, its PLAN subs that we need to take of. Once our SSBNs are safe in IOR, they can't be destroyed or taken out by any other SSN or any known weapon. that gives us very credible second strike capability. an MIRV equipped SSBN fleet is what we need and IN has done very good job in deciding its future force structure and developing those capabilities in house. Many of you have written about MESMA AIP but what DRDO has developed is the finest and best system in the world. Unlike IAF and IA who give up on DRDO and go for import, IN stays with DRDO and helps them. The case of Scorpene is their for everyone to see. IN refused to bite the import bug by refusing MESMA and stood firm with DRDO AIP.
DRDO never disappoints its haters. AIP is still cooking