Project 949A: Oscar-II

The newer missiles like Iskander and upgraded Granit would include chaff dispensors and decoys as well as EW receivers to detect enemy radar to avoid.

Can only imagine what they have on the Zircon.

Can still be jammed by just blasting bad data on the right frequencies.

But can they though?

The US Navy spend a small fortune developing the F-14 and Phoenix combination when all they needed was jammers built in to their ships to stop the missiles hitting them?

Would need to be a very impressive jammer to blind such a missile and would need a lot of power which would make it a useful target to attack on its own.

I suspect the USN is not convinced either... especially considering they can never be sure of which frequencies they will or wont be using.

Modern radars can jump around a range of different frequencies... do you jam all of them at once... that would require an enormous amount of power... but not only that... it would jam your own radar and your own radio communications channels too...

RTN wrote:
Can still be jammed by just blasting bad data on the right frequencies.

Should work on the singular missile - runs into trouble when dealing with salvoes of networked missiles which have much higher powers of discrimination at their disposal.

Source: 949AM submarines will carry the most cruise missiles in the Navy

MOSCOW, January 11-RIA Novosti. The upgraded submarines of Project 949AM will become the most armed Russian cruise missile submarines and will be able to carry up to 72 Kalibrovs on board."Onyx" or "Zircons", a source in the shipbuilding industry told RIA Novosti.

"The Antey submarines upgraded under the 949AM project will be able to carry up to 72 Kalibr, Onyx or Zircon cruise missiles. And in fact, they will become the most armed cruise missile submarines in the Russian Navy, " the source said.
He added that the total ammunition capacity of one 949AM submarine will be about 100 units of missile, torpedo and missile-torpedo weapons.
"One incomplete missile salvo from such a submarine will be enough to guarantee the destruction of an aircraft carrier multi — purpose group," the source added.
Currently, the Far Eastern Zvezda Shipyard (DVZ) is working on the repair and modernization of the nuclear submarine of Project 949A (code "Antey") "Irkutsk". The submarine is being upgraded according to the 949AM project. As a source told RIA Novosti earlier, the next nuclear-powered submarine to be re-equipped under the 949AM project will be the 949A Chelyabinsk nuclear-powered cruiser.

In 2019, when visiting the Far Eastern Military District, the Deputy Minister of DefenseAlexey Krivoruchko said that the nuclear-powered submarine missile cruiser Irkutsk after modernization will be able to use hypersonic missiles Zircon.
The 949A Antey submarines were developed at the Rubin Central Marine Engineering Design Bureau. In 1985-1996, 11 submarines of this class were built. The submarines have an underwater displacement of about 24 thousand tons, their maximum length is 155 meters. The main armament of the 949A — 24 project boats is the Granit supersonic anti-ship missiles.

https://ria.ru/20220111/podlodki-1767257506.html

But they did show a mockup with three tube sleeves in a Granit tube.

The issue is that they can make the tubes to fit Kalibre... which are 533mm calibre, or they can make them so the Onyx/Zircon fit which is presumably 750mm... the normal tube calibre of the UKSK launchers... but the Granit tubes are enormous over 1 metre wide because Granits were huge.

Just based on the maths of fitting circles in circles I would think if you can fit two smaller circles inside one big one that fitting three might work too...

Obviously it makes more sense to have fewer tubes if the choice is 533mm calibre weapons only to get three tubes in there... because having 72 subsonic anti ship missiles would not be as useful as 48 hypersonic ones.

But this seems to suggest they are fitting three to a tube... plus weapons in the torpedo room of course.

Don't know how correct it is but the diameter of the Granit is said to be 0.85m.

No, she is girthier than any Onyx/Yakhont...

A new design would make better use of the available space.

That photo you posted shows two side rails it launches from.

An existing P-700 tube is much more than a ribbed pipe of dedicated diameter.
It is a whole system of plugs, connectors, shafts&trays to connect the missile to the whole sub weaponry check&maintenence system and secure a safe&confident launch procedure.
You don't remove the missile from a launcher to check if its batteries are running. You don't do that to upload the attack parameters, flight path etc.
Only really complex maintenance procedures require removing the missile from a tube, and that is a kind of standard - for much less complicated SAM systems, you don't touch them while in a container for ... 10 years. Just connect the plug, and run a program.

It is complex and difficult, but the new missiles were all designed with UKSK launch tubes in mind when they were developed and the tubes are much slimmer.