SMART gives us the capability to engage ships and submarines from a very long distance in complete passive mode. Once a ship is detected by radar, we can fire SMART and it will dip underwater at a safe distance from the ship and than home on to the propeller noise and strike it. All kinds of anti missile defences will not be able to save the ship as the torpedo gets detected very late.
But anti-missile defences are created to destroy incoming missiles and they can kill it before it drops the torpedo...


