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Normal
One word - "Datalink". The SM-6 has a two-way datalink so that it can receive midcourse guidance updates through datalink from other aircraft such as the F-35 or E-2 and IIRC it also has GPS. It just needs to know the general area it needs to fly to so that when it enters the terminal phase (By switching on its' active seeker) it can quickly acquire its' target.