GPS? Relying on an American system? Yeah very reliable when you have a war…
Glonass, is unfortunately not very accurate and certainly not as accurate as a TV-guided bomb. So, I suppose they would use their Glonass bombs for less important targets while the TV guidance is probably used against targets that really have to be taken out accurately.
Just an opinion from a Maritime enthousiast though… Not an expert in missiles or guidance methods for AL missiles.

Sorry, made a little error, it is not Kerch who carries the S300F, yet Azov, another Kara class cruiser. Kerch was refitted with a completely new 3D AS radar instead.

SA-N-9 Grumble = S300F (Top Dome guidance radar, max missile range 90km)
SA-N-20 Gargoyle = S300FM (Well I’m not sure about this one, some say it’s SA-N-21)
Tombstone guidance radar, max missile range 150-200km)
The S300F is installed in Slava cruisers,Kerch( a Kara class cruiser ) and the first three units of the Kirov class. S300FM is only installed in Pyotr Velikiy, the last unit of the Kirov class. And probably this ship has only half of its VLS filled with this missile, the other half is probably filled with S300F, since it carries a single Tombstone radar on top of the bridge and a Top Dome on the aft part.

Russia has some intrinsic problems. They invented Stealth. The Kirov is perfectly stealthy built. The problem is their weapons… for every SAM system they have a different radar, and all those things are everything except stealth. I suppose if they took some effort, they could make an Orekh guidance radar quite stealthy. Yet these differences don’t seem to be their first problem. Logical, since stealth really isn’t the everything. As Jonesy has said in here and what is of course true, is that the first signal of a possible target is an ESM bearing, so whether you are stealthy or not, if you’re transmitting they’ll find you. At what range is of course a difference. It should of course not be forgotten that a bowwave and wake are most annoying for your RCS too. That is why the first DDX designs had this “iron” shape, with a bow going downwards instead of up.
It should also be noted that Visby indeed seems stealthy when you see it in a diagram. But it shouldn’t be forgotten that a ship rolls, hence these angles might start reflecting the waves right back to the radar… It will do so on a very inconstant way, yet it will give notice to the radar that something’s there…

? VLA is still in use. But that’s anti-submarine. The anti-torpedo measures on Western ships are mainly based on Decoys and silencing measures. So, avoiding a torpedo to be launched or just avoiding it to hit, not destroying the torpedo itself.

There are some older ships that have anti-submarine mortars, some of higher calibre than the RBU series. But those can only be used as anti-submarine and not as anti-torpedo. I doubt the RBU performance against torpedoes anyway…
It is said to be anti-diver system too, but as Jonesy has told me once. Better use a couple of hand grenades for that purpose.

Edit: US is working on an anti-torpedo torpedo. And test have been quite good, but it’s not yet finished.

Do you think the Russian Navy is rich? Well IN already has Kashtan on the Talwar frigates and most probably on Gorshkov in the future. So, that would count for the Standardisation too then.

of course it isn’t, but ANY VLS needs underdeck space. No strap on there. Of course you can put the missile system on top ofyour deck, and then apply some plates around them, but you can do the same with Kashtan…
Barak is less capable anyway.
I suppose the AK-630 is still the cheapest one around and hence the Indian choice for that system.