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China, Russia hold 2nd joint naval patrol in Pacific Ocean

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Published: Sep 16, 2022 12:35 AM







The Type 055 large destroyer Nanchang attached to the navy of the Chinese People's Liberation Army (PLA) Northern Theater Command is seen during deployment as part of the Russian Vostok 2022 strategic military drills lasting through September 7, 2022. The Russian Defense Ministry published footage of the meeting of the two countries' warships in the Sea of Japan on September 2, 2022. Photo: VCG

The Type 055 large destroyer Nanchang attached to the navy of the Chinese People's Liberation Army (PLA) Northern Theater Command is seen during deployment as part of the Russian Vostok 2022 strategic military drills lasting through September 7, 2022. The Russian Defense Ministry published footage of the meeting of the two countries' warships in the Sea of Japan on September 2, 2022. Photo: VCG


Warships from China and Russia have embarked on the second joint naval patrol in the Pacific Ocean shortly after the Russia-led Vostok-2022 strategic drills earlier this month, a move experts said on Thursday will demonstrate the two countries' responsibility as major powers and contribute to regional peace and stability.

During the patrol, which is part of the implementation of the military cooperation program between China and Russia, the two countries' warships will conduct joint tactical maneuvering, communications between the ships in the group, and exercises involving live-fire artillery shooting and flights of vessel-based helicopters, according to a press release by the Russian Defense Ministry on Thursday.

The tasks of the patrol are to strengthen naval cooperation between China and Russia, maintain peace and stability in the Asia-Pacific region, monitor the sea area and safeguard maritime economic activities by China and Russia, the press release said.

The Chinese People's Liberation Army (PLA) Navy sent the Type 055 large destroyer Nanchang, the Type 054A guided missile frigate Yancheng and the Type 903A comprehensive supply ship Dongpinghu for the joint patrol, while the Russian Navy sent the frigate Marshal Shaposhnikov, the corvette Hero of the Russian Federation Aldar Tsydenzhapov, the corvette Sovershennyy, the corvette Gromkiy and the medium sea tanker Pechenga, the Russian press release said.

The same Chinese vessels participated in the Russian
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from September 1 to 7, which saw warships from the two countries conducting drills in the waters and coastal zones of the Sea of Japan and the Sea of Okhotsk, according to previous media reports.

The latest joint naval patrol is the second one by the two countries, as the Chinese and Russian navies formed a joint flotilla after the China-Russia Joint Sea-2021 military exercise in October last year and sailed across the Sea of Japan, the West Pacific and the East China Sea in seven days in their
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, marking a circumnavigation around Japan.

As part of the scheduled military cooperation, the joint patrol does not target another party and is not related with the current regional and international situation, a Beijing-based military expert told the Global Times on Thursday, requesting anonymity.

The joint patrol will practically enhance the two navies' capabilities in jointly dealing with traditional and non-traditional maritime threats, and shows the two major powers' responsibility in contributing to peace and stability in the region, the expert said.

China and Russia will continue to hold military cooperation activities in the future, the expert said.

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Project 912?
Lin Yang, marine technology equipment director at the Shenyang Institute of Automation, Chinese Academy of Sciences, confirmed to the South China Morning Post this month that China is developing a series of extra-large unmanned underwater vehicles, or XLUUVs.
“Yes, we are doing it,” he said.

The institute, in China’s northeast Liaoning province, is a major producer of underwater robots to the Chinese military. Lin developed China’s first autonomous underwater vehicle with operational depth beyond 6km. He is now chief scientist of the 912 Project, a classified programme to develop new-generation military underwater robots in time for the 100-year anniversary of the Chinese Communist Party in 2021.

Lin called China’s unmanned submarine programme a countermeasure against similar weapons now under intensive development in the United States. He declined to elaborate on technical specifications because the information was “sensitive”.
“It will be announced sooner or later, but not now,” he added.
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Overbom

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Chinese scientists develop long-distance underwater communication in South China Sea​

  • Researchers say innovation would allow submarines and drones to maintain contact over more than 30,000 sq km (11,600 square miles) and aid communication with smart weapons
  • Team is developing a new technology to convert sound signals into whalesong to camouflage military channels
A listening device picked up sound signals from 105km (65 miles) away at a depth of 200 metres (656 feet) during a field test in an important passageway for submarines, according to the study by the team at northwestern China.
The data transmission rate reached nearly 200 bits per second (bps), on par with the bandwidth of very low-frequency radio sent by a naval command to nuclear submarines using the world’s largest land-based antennas.
Despite heavy noises in the background, the encrypted messages contained no mistakes, the researchers said.
Using commercially available technology, acoustic communication of this speed and quality is usually restricted to a distance of less than 10km.
In an experiment conducted by South Korean researchers last year using British hydrophones, for instance, a transmission rate of 128bps was recorded over a distance of 20km


The results of the South China Sea experiment proved the “effectiveness and good performance” of the new technology in increasing underwater communication range and efficiency, said project lead scientist professor Liu Songzuo, of Harbin Engineering University, one of the Chinese universities sanctioned by the US government, in a paper published in the domestic peer-reviewed journal Acta Acustica on September 6.
Liu and his colleagues conducted the experiment over a 3,800-metre deep sea floor located between the Taiwan-controlled Dongsha Islands, known in Taiwan as Pratas, and the hotly disputed Paracel Islands, known in mainland China as Xisha. Some military experts said the area had been an important passage for submarines in and out of waters close to China.


Liu said they conducted the test on a windy day, with waves rocking the research ship while a strong sea current pulled the hydrophone array away from the best listening position. Under the water lay rough terrain with cliffs and gorges that could absorb, deflect and distort the sound waves.
The strength of signals picked up by the few sensors was only a few decibels, or quieter than a breath. And these signals were mostly drowned out against strong background noise caused by natural and human-man activities in the ocean, they said.
Liu’s team said it had developed a new communication protocol to overcome these challenges.
The technology, inspired by mobile phone communications, could package the signal into many separate but related segments and beam them out as sound waves in all directions.
The receiver could pick up some of these waves coming from different directions and at different times.
An algorithm helped the receiver identify each of these waves and reconstruct the full message using random bits of the collected information.
The mathematical model used in this study was developed and evaluated with real-life data collected from the South China Sea to improve its performance in the region.
In a conference presentation earlier this year, Liu’s team said they were developing a new technology to convert the sound signals into whalesong to camouflage military channels.
 

luosifen

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zhangxueyan1.jpgAn air-cushioned landing craft attached to a naval landing ship flotilla under the PLA Southern Theater Command maneuvers at high speed during a beach landing training exercise in mid-August, 2022. (eng.chinamil.com.cn/Photo by Zhang Xueyan)

zhangxueyan2.jpgAn air-cushioned landing craft attached to a naval landing ship flotilla under the PLA Southern Theater Command arrives on shore during a beach landing training exercise in mid-August, 2022. (eng.chinamil.com.cn/Photo by Zhang Xueyan)

zhangxueyan3.jpgAn armored vehicle rolls out of an air cushioned landing craft during a beach landing training exercise conducted by a naval landing ship flotilla under the PLA Southern Theater Command in mid-August, 2022. (eng.chinamil.com.cn/Photo by Zhang Xueyan)
 
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