SM-2MR Block IIIB and SM-3 have terminal IR guidance. Also terminal active radar homing will just lock onto anything in it’s view, the missiles won’t have the IFF codes onboard. Only using semi active homing will be missiles be guided using a radar connected to the IFF system.
I don’t believe that amerikkkan ships have IR SAMs, just radar.
SM-2MR Block IIIB and SM-3 have terminal IR guidance. Also terminal active radar homing will just lock onto anything in it’s view, the missiles won’t have the IFF codes onboard. Only using semi active homing will be missiles be guided using a radar connected to the IFF system.