AK-130 is pretty big and very powerful, it would ruin most ships days in a dozen shots one of the brit type 42s would only take a few hits before it would be inoprable due to damage, it is a good bit of kit.
The AK-130 is one of the most powerful gun systems used in the world today and is a fully automatic, dual-purpose weapon. Design work was started by the PO Arsenal in 1967 on a single gun version designated as A-217. However, the required rate of fire of 60 rounds per minute was not reached during trials, so it was decided to switch to a twin mounting. The new system with a factory designation ZIF-94 used the same barrel and large number of components from the A-217.
The mountings are controlled by MP-184 Fire Control Radar Systems, which include a 2-band radar, low light TV, laser designator, system for selecting moving targets and an ESM system. This system has a range of 75 km (41 nm). The system provides the integration of all of the shipboard radars, exact measurement of all parameters of movement for all air, sea and land targets, exact bearing to the target, correction of shooting by splashes and automatic tracking of shells. The mounts are triaxially stabilized and the barrels are liquid cooled.
Source incliding discriptive pics:
http://www.navweaps.com/Weapons/WNRu...1-70_ak130.htm
What we got to realise with the russians is that they do have a large export market for weapons so many types of weapons gives the customer more choice more choice means more sales, its like if you walked into a shop and instead of that nice cake you wanted they replaced it with a eccles cake and said thats it all you got to choce from.
The russian export market is huge on average it sells 7.4 million AK47's a year it also seels fighters such as Mig 29 and SU33 submarines the kilo class is a favorite in the world it costs just $125million per unit ! compaired to the $800 of the type 212 and close to the $1bn for the scorpene.
main export countries for russia are India China North Korea Iran Vietnam Most if not all african states bar south africa latin america countires such as brazil and venezuala.
Thing is when you buy the $125 million kilo submarine your going to need to arm the thing all great when you got the submarine but it does need weapons to defend after all thats its purpose so you see a 53cm for $1million a skhval for $4million 53-65KE for $1.5 million the government will buy each type in drouges to create a stockpile so in the advent of war they have surpluss torpedos and missiles.
Then you go the upgrades its a bit like a PC really the tubes that take normally torpedo tubes can be upgraded for i think it was $12million a submarine to fire missiles so now they will stock pile klub missiles at $3mill a pop got yourself a very nice earner.
And if that submarine is in service 30 years chances are it will need a refit atleast twice in its life again it makes money in all your probably spending on one submairne close to $50 billion in its life !
So export market yes it does make sence to have a wide range of torpedos but on home turf it doesnt, if you notice the USA has only ever sold the MK48 to australia and britian has only sold spearfish to canada they dont make much in the line of export there offering just one unit no choice.