China’s Telephone, Hanging Array for 6000m Deep Sea Communication

Recovery of water telephone-6971 used for deep sea communication alone or in cordination with the acustic hanging array

Recovery of water telephone-6971 used for deep sea communication alone or in cordination with the acustic hanging array

Lifting down the acoustic hanging array used for deep sea communication alone or in cordination with the water telephone

Recoverty of the acoustic hanging array used for deep sea communication alone or in cordination with the water telephone

In its report on what China’s Jiaolong deep sea submersible has achieved in its submerge operations at world deepest Mariana Trench in northern Pacific, gives no photos of the submersible. As shown on top, four of the six photos posted by the website are water telephone-6971 and acoustic hanging array used for communication between the submersible and the mother ship more than 6,000 meters deep in the trench.

As there are no wire links between the telephone or array and the submersible or between them and the mother ship, there is speculation that the photos show China’s advanced deep sea communication equipment, which certainly can be used for military purposes.

Source: “Jiaolong’s huge achievements in submerging into world deepest trench” (summary and comment by Chan Kai Yee on the report in Chinese)

China to Explore for Seabed Mining, Develop Deep-Sea Tourism

The Jiaolong deep sea submersible

The Jiaolong deep sea submersible

China has recruited six trainees of deep-sea submersible operators and been building its State Deep Sea Base in Qingdao.

The six trainees will take a 2-year course and be certified operators after passing the examination. By that time, China will have eight deep-sea submersible operators.

There are two female trainees among the six. It is said that females are more careful and patient for the task of operating a deep-sea submersible.

Deep sea is a field human beings know even less than the space so that deep sea exploration is very dangerous. China has adopted nine safety measures for the Jiaolong, the most in the world.

In addition to the Jiaolong, earlier this year, China successfully tested its Qianlong 1 6,000-meter grade deep-sea unmanned submarine without cable link that can move freely to explore a large area and its Hailong unmanned submersible with cable link that can remain submerged for a long time and take samples from seabed.

The report says that the Jiaolong will conduct two survey voyages in 2014: survey in May and June of the environment and resources in Northwest Pacific Ocean where cobalt crusts are abundant; and survey of the resources and organisms in the areas with hot liquid sulfides in Southwest India Ocean in late 2014.

Besides scientific exploration, China will gradually achieve commercial application of the Jiaolong for deep-sea tourism.

Source: “China will have 8 operators for the Jiaolong, its deep-sea base will be completed in 2014” (summary by Chan Kai Yee based on the report in Chinese)

Related posts:

  • China races foreign rivals to mine the seabed for valuable minerals dated September 4, 2013
  • China Developing 11,000-meter Submersible dated June 24, 2013
  • Jiaolong Submersible to Carry 14 Scientists to Do Deep-sea Mineral Survey dated June 11, 2013
  • China’s target, dive down to 11,000 meters dated June 12, 2012
  • China’s military subsidized by civil sector dated June 13, 2012
  • China’s ambition to build a deep-sea station dated June 24, 2012
  • China’s manned submersible dives 7,020 meters deep dated June 24, 2012

China Developing 11,000-meter Submersible

Jiaolong submersible

Jiaolong submersible

According to Bejing Evening News, in a interview with its reporter, Cui Weicheng, first deputy chief engineer of Jiaolong submersible, said: China has not yet gone to the greatest depth, which is what we will work for at the next stage. At present we are doing the research for a new generation of submersible that can dive to the depth of 11,000 meters.

He also said that great efforts are being made to reduce the cost of the submersible and enable China to produce more than 90% of the parts of Jiaolong submersible instead of 60% at present.

According to him, Jiaolong costs 500 million yuan ($81.6 million) to build and each dive costs one million yuan ($163,000).

The designed life of Jiaolong is 30 years but if the cabin that carries people is in good conditions, it can be used forever, though different parts have their respective different lives.

According to the design, the maximum number of dives Jiaolong can do is 100. When 100 dives have been conducted, an assessment has to be made with respect to the conditions of the submersible for further use.

As for usage of the submersible, Cui said it is used for marine research and preparations for sea bottom mining.

Source: Beijing Evening News “Depute chief engineer of Jiaolong Submersible: China is developing 11,000-meter submersible” (Summary translated from Chinese by Chan Kai Yee)

War with the Philippines or Japan?

Japan can be regarded as China’s long-term enemy in quite a few Chinese people’s mindset though since the 1970s Sino-Japanese relations have been quite satisfactory until now when tension between the two countries has intensified in their disputes over the Diaoyu Islands (called Senkaku Islands by Japan).


China suffered a humiliating naval defeat by Japan in 1894 and the defeat on the land later forced China to lose Taiwan to Japan and pay heavy war compensation.


A naval war between China and Japan in 2014, the 120th anniversary of China’s naval defeat, for revenge is now quite a hot topic among Chinese people. However, I believe Chinese military strategists always follow Sun Tzu’s teaching and will not conduct a naval war with Japan as China does not have overwhelming naval superiority over Japan and China will surely be defeated if the US is involved.


However, naval war at South China Sea is quite possible.


In my post “Large military hospital for South China Sea actions”, I said, “A large military hospital newly built on Hainan Island indicates that China’s hard-line attitude in South China Sea is not merely bluffing.”


Today’s SCMP news “Sea dive risks stoking tensions” says, “China’s decision to send the Jiaolong manned submarine to explore a basin close to the Philippines may signal a new step in its approach to bolstering regional territorial claims, experts say.”


In addition, according to SCMP, Zhou Huaiyang, a professor with the State Key Laboratory of Marine Geology at Tongji University in Shanghai, “said researchers felt the only role Jiaolong could play was to obtain rock and liquid samples, which could shed light on the geophysical and chemical nature of the basin surface.


“But even that information was far removed from the civilian project’s primary objective, which was to understand how the basin was formed.


“Solving the mystery could help geologists pinpoint mineral belts as well as oil or natural gas reserves.”


Since Jiaolong could not make much contribution to the geological survey, its survey obviously aims at testing Philippine bottom line.


Negotiations between China and the Philippines are still being conducted without conclusion. We do not know whether there will be a repeat of standoff at Scarborough Shoal. It seems China has made up its mind to risk a naval war at South China Sea, but I still hope that China, the Philippines, Vietnam, etc. will strive to find a peaceful solution to their disputes. – Sea dive risks stoking tensions

via – Sea dive risks stoking tensions.