It would be a big cloud of rapidly decelerating kinetic energy that would be small enough for shipboard armor to withstand. Or it could simply deflect it into the ocean assuming it’s a sea-skimmer. Point is, CIWS has a better chance of stopping it than C-RAM does and it can try to stop more missiles than the C-RAM system we idiotically replaced the Phalanxes with.
Not so sure of the big cloud.
A few of the big chunks would be dangerous. I would want to run to the other side of the ship, for sure.