 The Navy's primary ballistic missile interceptor, the SM-3, would not be effective since it is designed to intercept missiles in the mid-course phase in space, so it would have to be launched almost immediately to hit before reentry or from an Aegis ship positioned under its flight path.The SM-2 Block 4 can intercept missiles reentering the atmosphere, but the warhead will be performing high-G maneuvers that may complicate interception.The US Navy has also began deploying the vastly more capable SM-6.