US nuclear submarine weak spot in bubble trail: Chinese scientists
A study published in one of China’s most respected peer-reviewed journals suggests that advanced submarines could be detected by exsting technology, a development that would threaten US dominance of the oceans.
The US is widely believed to operate some of the most difficult to detect submarines, with sophisticated acoustic and vibration reduction systems to blend them into the background noises of the ocean.
Carl Schuster, a retired US Navy captain and former director of operations at the Pacific Command’s Joint Intelligence Centre in Hawaii, told CNN in April that “submarines are one area where the United States retains unchallenged superiority over China”.
But the study, by researchers from the Chinese Academy of Sciences’ Fujian Institute of Research on the Structure of Matter, found an ultra-sensitive magnetic detector could pick up traces of the most advanced submarine from long distances away.
The team, led by Zou Shengnan, used computer modelling to determine whether it was possible to detect the almost imperceptible bubbles produced by a nuclear-powered submarine cruising at high speed.
The result “provides a new solution for the detection and tracking of submarines”, according to the paper published on August 1 by the Chinese Journal of Ship Research.
The journal is run by the China Ship Scientific Research Centre, which has a long and respected history of cutting-edge developments in ship and ocean engineering.
The researchers calculated that the extremely low frequency (ELF) signal produced by a submarine’s bubbles could be stronger than the sensitivities of advanced magnetic anomaly detectors by three to six orders of magnitude.
If China wants to keep U.S. ships out of the S. China Sea simply mine the whole area especially the Taiwan Straits.
At least they're looking out for the US and gave us a heads up that our steatlh subs are close to being detectable and trackable by them..."Well boys, they are onto us!!, back to the drawing board!! or wait I thought our technology for government agencies and military was 30 to 50 years ahead of present time tech???", so today civilians are using technology that was invented and already in use by the government back in the early seventies up till early nineties, if that '30 to '50 years ahead theory is to be believed! It's all smoke and mirrors on smoke and mirrors, layer after layer, pure obfuscation!!!!
Cavitation noise has always been a problem for propeller driven ships and boats. High speed , and most low speed, propellers turning can be heard by the naked ear under water from miles away, much less by sophisticated sonar equipment. It is one of the main reasons our Ohio Class nuclear missile submarines, at over 160 meters long, spend most of their time underwater at 3- 4 knots. At 150-600 meters down, below the thermocline, they are almost impossible to detect. The Germans have developed propellers that give off far less cavitation than conventional propellers that makes them very difficult to find underwater using passive sonar ( not emitting sound pulses of those doing the hunting.
The PLAN needs plenty of work to make their own subs be more silent. On 12 January 2018, a Type 093A submarine surfaced in the contiguous zone (within 24 nautical miles) off the disputed Senkaku/Diaoyu Islands.According to the Japanese Defense Ministry, a Maritime Self-Defense Force destroyer and P-3C maritime patrol aircraft had been tracking the Chinese submarine since mid-morning on January 10th.73 The best estimate of the submarine’s speed was around 5-7 knots.
Theoretical physicists and world scientists are still trying to prove Albert Einstein Theory of Relativity. Chinese scientists are more concerned about catching up to the west.
@Km T. Really ? Do you know any names of those people?
@Km T. 真的吗？都有哪些人，你知道吗？
Quote - Frontier science, in contrast, refers to scientific ideas that are relatively new and have not yet been supported by years of scientific evidence. Frontier research takes place at the frontiers of knowledge in a particular field.
It seem that Chinese scientists are more interested in inventions to counter the west. While scientists in the west go on to discover new things about the universe and the galaxy. One example the creation of the James West telescope and the future plan to create one even better.
@Km T. How could you draw such conclusion? There are many Chinese science and technology developments not related to military, e.g. Chinese Moon and Mar space projects. Look at your home, how many items are manufactured in China? Stop the ideological nonsense.
@Simon H. And you have this thinking Chinese "scientists' are responsible for making goods cheaper for you and me. Going to the moon and exploring Mars is like reinventing the wheel or try to make it better. People has done that long before the Chinese think of it. New discoveries are what scientists should be doing. Not discover making your missles or your submarines better to counter your enemies.
@Km T. Is there any medicine for irrelevance?
@Km T 有没有治疗词不达意的药？
new propeller designs has no cavitation
Should the announcement be more in the vein of peaceful coexstence and say that the discovery was able to track nuclear submarines without naming a country, thereby hel to tone down the rhetoric between China and the US? In today's world, everyone needs to coexst and help each other as the world is under stress from the huge threat of climate change.
The average depth of Taiwan Strait is about 60+ metres. The USN nuclear powered submarines usually travel at the depth of 300 metres. Therefore, it is not comfortable for them to navigate in the Strait, and easily detected. Do you remember what happened to USS Connecticut in 2021? Those nuclear powered submarines are not good for coastal travel.
If I were the Pentagon, I would give an award to the Chinese academy of sciences for increasing my bonus
@Ken K. No bonus. US government is bankrupt.
Does anyone here really believe that the SCMP publishes submarine 'secrets'?
@True origins What makes you think JDW is reliable?
@C C. It may not be the most reliable publication in the world, but I would imagine it probably knows more about defense matter than a generic newspaper like SCMP or Times of India.
@True origins Remember "intelligence assets" work at most major media
Whilst the work done by Chinese scientists deserves applause, but is discretion not considered a better part of valour ? If an opponent knows your capabilities, then in all probability the battle is already lost !!
@W K. Remember the USS Connecticut... a lot goes on we don't know
OMG!! China has created another nightmare for the pentagon officials. No wonder they don't like China so much. Cannot sleep peacefully at night.
Well, I read the story and hardly understood a word of it.
@James L. Great analogy. Thanks.
@James L. Do you drive a car? How useful is your car if you keep driving it at the seed of a person walking while avoiding acceleration?
@C C. I have seen the waves created by an ultrasound device, they do appear as though cavities/depressions are formed, but are very small, they then progressively fan out. L
I wonder why Americans wake up daily with China nightmare? Chinese never wake up with a thought of Americans let alone having nightmares of them...
@Anonymous Totally! The days when this forum was a platform for interesting debates are long gone, leaving mainly Party-line stuff nailed to the boards.