Gambit, I'll make this easier for you. Modern subs have active noise cancellation (conceptually like $35 headphones Made in China). When it's turned on, noise is lowered. When it's off, noise is higher.
The radar A-scope is a SIMPLIFIED display of a target return based upon the most prominent property of said target -- echo.
The sonar 'waterfall' scope is the same thing -- a SIMPLIFIED display of an underwater target based upon the most prominent property of said target -- echo.
Both methods of VISUALIZATION of display does not negate what they are. The 'waterfall' effect is only the result of adding time as a factor in the 'vertical' view whereas time does not figure in the radar A-scope. In fact, if the sonar echo is analyzed and displayed in freq and sound pressure level (SPL) or amplitude, the visualization of the echo would like practically identical to the radar A-scope, which include amplitude.
Spin. Just look at the pics you posted and the one I posted.
They add a time dimension to Doppler radar too on the Weather Channel. You know what I'm talking about. The properties of water does not equal air. You can't fit a 50,000 watt radio station inside a fighter plane, but every attack sub has one in the form of active sonar.
Last edited by Aramsogo; 12-31-2011 at 12:21 AM.
Let me ask you a question Gambit and I'm sure you'll give me an honest answer because you are an honorable person I assume. If Chinese FHM / Maxim wrote an article saying Virginia-Class is noisier and easier to track than Los Angeles-Class, would you say bullsh!t ?? How come these common sense standards don't apply in this case ??
Last edited by Aramsogo; 12-31-2011 at 01:08 AM.
l can not understood something...
ATC use secondary radar and aircraft use transponder...so F-22 no needs RCS enhancer
if F-22 tactically use it, than submarines sould use same tactic....
or oppositely, show your technical ability that keep the peace...
am l wrong?
Last edited by Alpery; 12-31-2011 at 10:47 AM.
the old version subs are very noisy of China but not the Latest one of China
its obvious that Chinese subs are noisy
there is a source which shows that china until recently ( till 2000 ) didn't gave full attention to PLAN
but now china is planning expansion of PLAN and will do best to solve noise problem
China's Noisy Subs Get Busier -- And Easier to Track | Danger Room | Wired.com
The article's title said nothing about 'noisier', just 'busier'.China’s Noisy Subs Get Busier — And Easier to Track
This has nothing about China's subs 'getting noisier', only that they have been spending more time at sea.and, the roughly 60 submarines in the People’s Liberation Army Navy (PLAN) fleet are spending more and more time on combat-ready patrols — signaling China’s increasing naval competence and growing seriousness about influencing the western Pacific Ocean.
This has nothing about China's subs 'getting noisier', only that now that there are more of them at sea, analysis found that they are noisier than expected. There is a difference between expectation versus known.Originally Posted by Wired
What this mean is that the lack of China's subs AT SEA mean the lack of knowledge about how loud or silent the Chinese subs are. The last highlighted statement is a generalization, as in 'a vessel', a generic, not a specific, as in 'a Chinese sub'.Originally Posted by Wired
Right...So to guess conservatively mean you give the benefit of the doubt, as in expecting China's subs to be 'silent' enough to make it difficult to detect, but then because of an upsurge in PLAN sub activities, US subs found out that PLAN subs are not as quiet as what was 'conservatively' guessed.Originally Posted by Wired
Right...So once again, we are not saying that Chinese subs have been getting 'noisier' from a known standard, only that they are 'noisier' than what we originally guessed. More data support those new estimations.Originally Posted by Wired
The known standard here is not Chinese but Russian. So based upon analysis of INCREASED Chinese sub activities, we found that Chinese subs are inferior to Russian subs.Originally Posted by Wired
The last highlighted words are more rhetorical than it is technical. The 'noisier' does not mean intensity PER unit, as in per Chinese sub, but rather of overall volume, as in more Chinese sub activities that contributed more noise into the seas.Originally Posted by Wired
Your comment about being Chinese mean you cannot believe anything that is critical of China, no matter how much of that criticism is based upon science, reinforced the belief that the Chinese boys here are a bunch of racists.
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