Arihant-class SSBN - News & Discussions

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Our boomer fleet is growing fast. It needs a proper home or two for redundancy. We know that NAOB Rambilli on the East coast is where the fleet is to be based. Reports say Rambilli will achieve IOC in 2026.

However, there is also the Seabird/Kadamba naval base on the West coast which apparently also has basing infra for nuke subs.

We need to expedite the latter for maximum redundancy and also explore the feasibility of developing inland waterways (major rivers) for rotating subs between both bases.
 
Place orders for next 5 Survey Vessels fast. We need to have the best mapping of IOR in the world.
 
They should be capable of carrying both K4 and K5 SLBM
Makes little sense to make carry both. The sub needs to be robust enough for launching a significant high dia article, even if it is shorter in height for optimised weight purpose.

Call me cynical but my guess is S2 S3 will play as deterrence against any invading carrier strike force , a role that prompted making the ssbn in the first place. Enhanced arihant class if there are indeed 2 will play role of nuke delivery via K4. Then we move onto the much more powerful boomer class in S5 batch and its suitable weaponry via K5 and subsequent iterations. There is some hint of an even more powerful rocket motor stage being fabricated, whether that is turned into a new SLBM or not is not certain. But the scope will be there. So basically when there was need for a boomer to carry 2 types of missiles K15 and K-4, that will be gone with S5 class hosting true icbm class mirv payload rockets. It makes little sense to make the same sub carry both, it will make an inherently complex weapon system deployment even further complicated due to multi adapter setup. This still can be implemented if the user demands it, but from a sane perspective only a foolish user would demand it.

K15 was intended as a low rcs based but longer length missile more suitable for a tactical use than nuke delivery. The SLBM we are making today are rather chubbier and shorter, more RCS but since nuke delivery platform it does not matter. This transition from very long slim rocket system to shorter smaller rocket (due to new technology infusion in making missiles) is also reflected in the boomer design iteration as explained by Parthu sir post.
 
Makes little sense to make carry both. The sub needs to be robust enough for launching a significant high dia article, even if it is shorter in height for optimised weight purpose.

Call me cynical but my guess is S2 S3 will play as deterrence against any invading carrier strike force , a role that prompted making the ssbn in the first place. Enhanced arihant class if there are indeed 2 will play role of nuke delivery via K4. Then we move onto the much more powerful boomer class in S5 batch and its suitable weaponry via K5 and subsequent iterations. There is some hint of an even more powerful rocket motor stage being fabricated, whether that is turned into a new SLBM or not is not certain. But the scope will be there. So basically when there was need for a boomer to carry 2 types of missiles K15 and K-4, that will be gone with S5 class hosting true icbm class mirv payload rockets. It makes little sense to make the same sub carry both, it will make an inherently complex weapon system deployment even further complicated due to multi adapter setup. This still can be implemented if the user demands it, but from a sane perspective only a foolish user would demand it.

K15 was intended as a low rcs based but longer length missile more suitable for a tactical use than nuke delivery. The SLBM we are making today are rather chubbier and shorter, more RCS but since nuke delivery platform it does not matter. This transition from very long slim rocket system to shorter smaller rocket (due to new technology infusion in making missiles) is also reflected in the boomer design iteration as explained by Parthu sir post.
What about K6? Is there any anything in Open-source domain that suggest we are working on it?
 
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Does it make sense that there are 2 subs of 6k ton displacement that are the early series boomers , and one of them carries only K15 ? Who even operationally restricts the third leg like that when there are few subs available as a deterrent? Not taking into account k4 was not made back then part, of course it was not when ATV project started, but they did have plan. Stretched Arihants are proof of that.

It is understandable to fill the word quota they have to copy paste the third column in every single report Rajat Pandit has reported almost every time, meaningless word jumble that everyone is well aware of.
 
Does it make sense that there are 2 subs of 6k ton displacement that are the early series boomers , and one of them carries only K15 ? Who even operationally restricts the third leg like that when there are few subs available as a deterrent? Not taking into account k4 was not made back then part, of course it was not when ATV project started, but they did have plan. Stretched Arihants are proof of that.

It is understandable to fill the word quota they have to copy paste the third column in every single report Rajat Pandit has reported almost every time, meaningless word jumble that everyone is well aware of.
Wonder what Rajat Pandit has been smoking? Arihant and Arighat can carry 4 K4 per tube in place of 3×K-15. This is well documented.

The silos seem to be of the same dimension, even if the latter 2 hulls are bigger. All DRDO did was add an extra missile compartment with 4 more cells to them.
 
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That 2nd one might be the test vehicle for the past 2-3 tests. The one under the shed might be the longer one (?)
 
BREAKING. India’s fourth SSBN S-4* sails out for sea trials.


The ATVP has already begun construction of the first two units of the S5 SSBNs, which at 13,500 tons are twice the size of the Arihant-class submarines. The first S5 will enter service in the early 2030s. A total of four S5 SSBNs will be acquired by the late 2030s.
 
The ATVP has already begun construction of the first two units of the S5 SSBNs, which at 13,500 tons are twice the size of the Arihant-class submarines. The first S5 will enter service in the early 2030s. A total of four S5 SSBNs will be acquired by the late 2030s.
The 200MWe reactor design for S5 and P77 (likely based on Russia's OK-650B) is also ready. 10 year refueling cycle.