.
As has already been pointed out, the priority should be stopping missiles as far off as possible.
The 57mm Mk 110, as recently selected by the USN, is a CIWS with a range of nine miles. And it's made by BAE S. And it can be fitted on hulls down to 150 tons.
Goalkeeper may have a longer range than Phalanx, but it still stops incoming far too close for comfort. Certainly close enough to leave mother within the debris field of something travelling at Mach 2.