[Nomentatus]

Author knows not only this, but notes more than one instance of this defensive tactic failing, including: "A small French nuclear sub, Saphir, snuck past several points of defense and sunk the U.S. carrier Theodore Roosevelt and half of its escort ships."

[perilunar]

Swedish and Australian diesel-electric subs have also 'sunk' US carriers in war games.

see:

http://nationalinterest.org/blog/the-buzz/swedens-super-stea...

http://nation.time.com/2012/12/04/more-than-the-navys-number...