Chinese researchers achieve 3D underwater acoustic carpet cloak first with ‘Black Panther’-like features

This is a model and photograph of the 3D underwater acoustic carpet cloak composed of over 700 steel strips. Image courtesy IOA.

 

Recently, a research team led by Prof. YANG Jun from the Institute of Acoustics (IOA) of the Chinese Academy of Sciences designed and fabricated a 3D underwater acoustic carpet cloak (UACC) using transformation acoustics. Like a shield, the carpet cloak is a material shell that can reflect waves as if the waves were reflecting off a planar surface. Hence, the cloaked target becomes undetectable to underwater detection instruments like sonar. Continue reading

Russia sends spy ship near US coast, deploys banned missiles at home, officials say

A Russian spy ship was spotted patrolling off the East Coast of the United States on Tuesday morning, the first such instance during the Trump administration — and the same day it was learned the Kremlin had secretly deployed controversial cruise missiles inside Russia, U.S. officials told Fox News.

The Russian spy ship was in international waters, 70 miles off the coast of Delaware and heading north at 10 knots, according to one official. The U.S. territory line is 12 nautical miles.

It was not immediately clear where the Russian spy ship is headed. Continue reading

Russian Navy’s New Sonar Can ‘Hear’ Every Sub Anywhere

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Powerful sonar capable of “hearing” fourth generation nuclear submarines lurking in the deep will undergo trials at Russia’s Northern Fleet before the end of this year.

The transmitter/receiver unit of the Batareya (Battery) sonar will be lowered to around 300 meters into the water 30 kilometers from the White Sea coast to pick up submarine sounds and send the date [sic] up via a fiber optic cable, said Sergei Tsygankov, one of the new sonar’s designers. Continue reading