The submarine salvaged off the coast of Indonesia can demonstrate the technology, route of operation and strategy of the Chinese submarine, according to experts.

China in 2016 seized a US naval unmanned submersible (UUV) in the South China Sea, accusing Washington of conducting "close-range reconnaissance" against Beijing.

The situation has now changed, as Indonesian fishermen have picked up three Chinese UUVs in the past two years, the last time taking place in waters on the Sunda Strait, near the Selayar Islands in South Sulawesi province in central Indonesia on Wednesday.

Malcolm Davis, a defense strategy analyst at the Australian Institute of Strategic Policy, said the finding was remarkable, as the Sunda Strait is one of the key maritime routes in the region, allowing ships to

He said China is looking to secure the ability to deploy submarines from the South China Sea to the Indian Ocean or northern and western Australia for potential conflicts in the future.

"This submarine may be collecting sonar (sonar) positioning data to build an accurate depth map of the seabed, as well as using sensors to record the seawater temperature and hydroelectric conditions, helping the ship to

Indonesian social media users quickly discovered similarities between this submarine and the Sea Wing model, which was introduced to China in 2014. It carries many sensors for marine research, allowing the measurement of the direction and strength of the current.

The discovery of UUV China shows the country's progress in developing unmanned diving equipment, as well as how Beijing prepares for submarine warfare.

"The presence of the UUV indicates that China is deploying submarines to those areas to gather intelligence and improve combat capabilities in these waters. Beijing may want to patrol those waters.

The position of three submersibles was found near Indonesia in the past two years.

Davis believes the UUV activity is a sign that China intends to deploy submarines in offshore waters.

China's UUV technology is still inferior to the US, but Beijing is actively closing the gap with Washington.

The Chinese Navy in 2019 launched a large unmanned submersible HSU-001, with the size and payload of weapons close to the American Orca model.