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[[File:Yasen-Class Nuclear Submarine “Kazan” Arrives in Havana Harbor.PNG|right|300px|thumb|Yasen-class nuclear submarine “Kazan” arrival in Havana Harbor.]]

[[File:Yasen-class nuclear submarine.PNG|right|300px|thumb|Yasen-class nuclear submarine.]]

The [[US Navy]] has admitted it cannot track Russia's newest ultra-quiet and [[steal]]thy Yasen-class nuclear missile submarines having lost track of the Yasen-class submarine Severodvinsk for weeks due to the [[fact]] its hull is made of non or low-[[magnet]]ic steel, which either significantly reduces or eliminates the Severodvinsk’s magnetic signature.<ref>https://nationalinterest.org/blog/reboot/russias-yasen-class-submarines-why-cant-us-navy-track-it-180936</ref>

The [[US Navy]] has admitted it cannot track Russia's newest ultra-quiet and [[steal]]thy Yasen-class nuclear missile submarines having lost track of the Yasen-class submarine Severodvinsk for weeks due to the [[fact]] its hull is made of non or low-[[magnet]]ic steel, which either significantly reduces or eliminates the Severodvinsk’s magnetic signature.<ref>https://nationalinterest.org/blog/reboot/russias-yasen-class-submarines-why-cant-us-navy-track-it-180936</ref>