The RIM-66C/D Standard MR (SM-2MR Block I) was developed in the 1970s and was a key part of the Aegis combat system and New Threat Upgrade (NTU).
RIM-66C/D Standard MR (SM-2MR Block I), blev udviklet i 1970'erne og er en nøgledel af AEGIS kampsystemet og New Threat Upgrade (NTU).