I thought the Los Angeles class was the quietest sub we have, not anymore.The quietest American submarines are the nuclear-powered Virginia-class fast-attack submarines (such as the USS Montana (SSN-794)) and the highly advanced Seawolf-class. Emitting acoustic signatures as low as 95 decibels, these vessels utilize cutting-edge acoustic dampening, isolated deck structures, and pump-jet propulsors to achieve their near-undetectable stealth. The Virginia-class Submarine boasts noise levels roughly 10 times quieter than the preceding Los Angeles-class boats pierside and operates silently at twice the speed of older submarines.
