While anti-ship missiles get a lot of attention, submarine launched torpedoes are arguably a much more dangerous threat to U.S. Navy surface warships. Perhaps the most dangerous torpedoes that the Navy might encounter are high-performance Russian-made wake homing torpedoes.
Wake-homing torpedoes have sensors that track the churn in the water as a ship passes through and homes in on the turbulence following a snake-like pattern. Wake-homing torpedoes have long vexed the Navy because the weapons ignore counter-measures, like the Navy’s Nixie decoy, and attack the ship directly. Further, the weapons are believed to have a very high probability of kill, which means they pose a deadly threat. The only real counter to the wake-homing torpedo problem is to develop an anti-torpedo torpedo (ATT). The Navy has deployed a prototype onboard the carrier USS George HW Bush, but it not clear how effective the new ATTs are.