After separation from the third stage, the Trident D5 Post-Boost Vehicle(PBV) takes stellar sightings and updates its guidance systems.
The PBV is then able to receive GPS navigation updates to correct its velocity and position in space.
FYI, the accuracies achieved are still classified and even I do not know them.
But they are better than 90 meters CEP.
So the Trident D5 could be used as a carrier killer weapon thanks to its high accuracy.
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Thanks for the mention.
No it can’t. Trident can do course correction to make minor adjustments but it can’t change its target mid-flight.
Ballistic missiles simply are not weapons you use to deal with even predictable moving targets and a carrier group is a very fast moving target following a non-predictable course. It’s likely that the missile which simply land harmlessly 100nm away where the group USED to be if they are lucky.
Besides, none of this matters. Regardless of whether the missile hits or not the response would be nuclear and it would be completely overwhelming.