As these missiles do not have to "ride" a illuminated beam all the way to the target, they can fly more a more fuel-efficient route thus greatly improving their effective range.
Aegis ships cannot fire the SM-2 ER as their rapid fire launchers cannot accommodate the manual finning required by those missiles. A special, shorter finless booster (Block IV) was developed for the SM-2 MR specifically for those Aegis ships with Mark 26 or Mark 41 launchers.
SM2-ER being fired from China Lake
Standard 2 ER RIM-67C
|Designation||SM-2 ER RIM-67B|
|Ship Class Used On||Many|
|Date In Service||1981|
|Weight||2,980 lbs. (1,341 kg)|
|Dimensions||13.5" x 26.2 feet Span 62" (34 cm x 7.9 m Span 1.6 m)|
|Payload||250 lbs. (113 kg) continuous rod|
|Range||7,000 - 200,000 yards (6,400 - 183,000 m)|
|Propulsion||Sustainer rocket plus separate Booster|