The upgrade was also quite expensive and the ships didn't serve much longer after the modification. For example, USS Gridley (CG-21) received NTU in 1991 at a cost of $55 million, but was decommissioned in early 1994.
The upgrade was costly and the ships didn't operate for long after modification. For example, USS Gridley (CG-21) received NTU in 1991 at a cost of $55 million but was decommissioned in early 1994.