Chinese submarines in Indian ocean constantly tracked by Indian Navy

[Nilgiri]

Different ship have different density, propulsion method that gives out unique signature, while it most likely cannot tell the ship in the same class (eg, you cannot tell between the Los Angeles and the Omaha, both being Los Angeles Class Submarine) but you can most likely be able to distinguish between subclasses of each classes (say a Turkey Type 214 and a South Korean Type 214.)

Each ship have distinct signature, come from either hull modification or layout or structural change to even cruise characteristic. You can tell a Chinese Ming Class from Bangladesh Ming Class

Actually it would depend on the sensors + signal processing dedicated to it...given these submarines (even within same class of the same country) are not all completely identical clones. I remember talking to a colleague at work (we were working on optimising acoustic testing and resonances for jet engines).... he did work on some classified stuff for US signals processing....and he mentioned a notable factor as sensors improve is the fact the targets are made somewhat sequentially (rather than in complete parallel)....that this causes (significant enough) parts (esp rotating/pressure/bearings etc) within the targets to be at different stages in their life (and causing enough variance from mean in specific parts of their acoustic signature)....these add further resonances and part summations the more complex the system is.

There is definite dampening that happens in the environment (and of course aided by SOP of fabrication, testing and maintenance that seeks to have as best uniformity as possible), but if you have enough sensors and enough signal processing +cross tabulation with a good database (esp one linked and updated to larger C4I w.r.t known deployments etc) within range+quality....you can with a high confidence say which specific sub it is...especially if your specialist crew and systems are trained for this discipline. USN and cpl NATO navies are especially well versed in it from the heritage and experience developed during the cold war submarine hunting.

 

[LeGenD]

IN is not a joke.

IN is also in touch with USN for matters of mutual interest. This news should be taken seriously, but Indians are loudmouths.

 

[jhungary]

Actually it would depend on the sensors + signal processing dedicated to it...given these submarines (even within same class of the same country) are not all completely identical clones. I remember talking to a colleague at work (we were working on optimising acoustic testing and resonances for jet engines).... he did work on some classified stuff for US signals processing....and he mentioned a notable factor as sensors improve is the fact the targets are made somewhat sequentially (rather than in complete parallel)....that this causes (significant enough) parts (esp rotating/pressure/bearings etc) within the targets to be at different stages in their life (and causing enough variance from mean in specific parts of their acoustic signature)....these add further resonances and part summations the more complex the system is.

There is definite dampening that happens in the environment (and of course aided by SOP of fabrication, testing and maintenance that seeks to have as best uniformity as possible), but if you have enough sensors and enough signal processing +cross tabulation with a good database (esp one linked and updated to larger C4I w.r.t known deployments etc) within range+quality....you can with a high confidence say which specific sub it is...especially if your specialist crew and systems are trained for this discipline. USN and cpl NATO navies are especially well versed in it from the heritage and experience developed during the cold war submarine hunting.

I cannot tell you anything other than the stuff that I know......lol

What I know other than what I said and may be related is when Submarine using passive detection, they can read different type of signal just by analysing the sound. Depending on what is being reflected, they may be even able to pick up slightest different on the signature.

On the other hand, some people would say Captain of the ship would have know how the other Captain operate and will instantly know who is behind the boat they were tailing because of the habitual things the other captain do. Now I am not going to say whether or not this is true, but I have multiple source told me that it happens...

Other than that, I don't know anymore about the subject..

 

[undercover JIX]

Thank you India for letting the sub pass. Dhannevad aap ki mahanta, kirpiya hai je chini sainik jivat hain.