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Originally Posted by OKO
modern Diesel electric are ALWAYS quieter than SSN
from a long time now, certainly even before you born.
And that's why there is lots of discussion about this new kind of threat in western HQ.
Even a KILO make less noise than a "modern" nuke, even it's an old diesel/electric plateform now.
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I will agree completly that they ARE quieter at stop. But not neccesarily ALWAYS quieter when running. Of course, when you put proportionally same amount of money and same technical level into SSN and SSK - the SSK will be quieter ! But not every SSK is on the same technical level as modern SSNs. For example Type-212 boat may be as quiet as Seawolf (if this was design goal!) and at stop probably even quieter with no doubt from me. But not a Kilo. From available data (and Kilos are quite old now) whe know that when running, they are on about same level of noise that Akula class. Of course they become much quieter than Akula at full stop. But again Akula is not most recent quietness standard... Kilo Improved at 3kts are said to be quieter than 688I. At full stop probably quieter still (sad we can't simulate this in DW).
But Seawolf is said to be about 10dB quieter than 688I. So are SSKs always quieter or not ? I think - they usually are. If build for proportionally same money and technical level, they are quieter.
But in case of Seawolf we maybe ask ourselves a question - so there is an SSK boat for few dozens million $ - it's very quiet. It's quieter than SSNs, even though less expensive. Probably as quiet or quieter when slow, and really quieter at stop.
But then - if you spend $ 13 BILLIONS !!!!
- could you for this money design an SSN (for $ 4.4 Billions for a piece) as quiet as best SSK ?? :-) IMO it's possible :-)
Is the Seawolf cost-effective ? I think no :-) But it is real. And can it be as quiet as best current SSKs running at 3kts ? I think that for THAT money - it can
Of course those best current SSKs, if somone spend few billions $ on them
could be quieter at full stop