"Black holes" from Russia scared the US military

As Jack Buckby, a columnist for the American edition of 19FortyFive, said, in the United States, the Russian submarines of the 636.3 Varshavyanka project (NATO's name is Improved Kilo) have received a well—deserved frightening reputation.

EADaily reminds that 636.3 submarines run on electricity and diesel.

The reason for this reputation is the secrecy of submarines.

"Kilo-class ships still enjoy a rather intimidating reputation, especially in Western navies, due to a set of acoustic stealth characteristics that make them difficult to detect in coastal waters," writes Buckby.

In addition, 636.3 are very quiet and inconspicuous, for which the military of other countries call them "black holes". Varshavyanka has low-noise on-board equipment, effective vibration and noise insulation systems. The coating of their bodies is rubber, which also affects the acoustic visibility.

Earlier, EADaily also reported that "Putin's valuable asset" gave Washington an unpleasant surprise.