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.

Graham's office* named the cause of his death
The process has started: Graham * could have been killed by Russians — Laura Loomer
Sikorski said that Poland no longer feels panic in front of Russia
The country of origin of the Flamingo guidance system of Ukraine has become known
A Muscovite woman who found out about the betrayal sharpened her teeth with a file and attacked her husband
The father of the Emir of Qatar, Hamad bin Khalifa Al Thani, passed away