RIM-174 Standard ERAM
|Place of origin||United States|
|Used by||In production for the
United States Navy
Royal Australian Navy 
|Unit cost||US$4.3m (FY13)
US$5.1m (inc R&D)
|Produced||2009 - present|
|Number built||1200 (planned)|
|Weight||3,300 lbs (1500 kg)|
|Length||21 ft 6 in (6.55 m)|
|Diameter||21 in (0.53 m) max.|
|Warhead||blast fragmentation warhead|
|radar and contact fuze|
|Engine||Two Stage: Solid rocket booster, Solid rocket booster/sustainer|
|Wingspan||61.8 in (1.57 m)|
|130 nm (240 km)|
|Flight ceiling||> 110,000 ft (33,000 m)|
|Inertial guidance, active radar homing and semi active radar homing|
The RIM-174 Standard Extended Range Active Missile (ERAM), or Standard Missile 6 (SM-6) is a missile in current production for the United States Navy. It was designed for extended range anti-air warfare (ER-AAW) purposes providing capability against fixed and rotary-wing aircraft, unmanned aerial vehicles, and anti-ship cruise missiles in flight, both over sea and land. The missile uses the airframe of the earlier SM-2ER Block IV (RIM-156A) missile, adding the active radar homing seeker from the AIM-120C AMRAAM in place of the semi-active seeker of the previous design. This will improve the capability of the Standard missile against highly agile targets, and targets beyond the effective range of the launching vessels' target illumination radars. Initial operating capability was planned for 2013 and has been successfully achieved on November 27, 2013.
The Standard ERAM is a two stage missile with a booster stage and a second stage. It is similar in appearance to the RIM-156A Standard missile. The radar seeker is an enlarged version adapted from the AIM-120C AMRAAM seeker (13.5 inches versus 7 inches).
The missile may be employed in a number of modes: inertial guided to target with terminal acquisition using active radar seeker, semi-active radar homing all the way, or an over the horizon shot with cooperative engagement capability. The missile is also capable of terminal ballistic missile defense as a supplement to the SM-3 missile.
Unlike other missiles of the Standard family, the ERAM can be periodically tested and certified without removal from the VLS cell.
Raytheon entered a contract in 2004 to develop this missile for the United States Navy, after the cancellation of the SM-2ER Block IVA (RIM-156B) missile. Development started in 2005, followed by testing in 2007. The missile was officially designated RIM-174A in February 2008. Initial low rate production was authorized in 2009.
Raytheon received a $93 million contract to begin production of the RIM-174A in September 2009. The first low-rate production missile was delivered in March 2011. SM-6 was approved for full-rate production in May 2013 and the first full-production missile will be delivered in April 2015.
On October 3, 2013 Raytheon was awarded a contract for "89 Standard Missile-6 Block I all up rounds, spares, containers and services" by the U.S. Navy.
- Australian Defence White Paper 2009
- "GAO-13-294SP DEFENSE ACQUISITIONS Assessments of Selected Weapon Programs". US Government Accountability Office. March 2013. pp. 123–4. Retrieved 26 May 2013.
- Raytheon Missile Systems Standard Missile 6, Accessed February 10, 2011.
- Raytheon RIM-174 ERAM (SM-6), designation-systems.net, November 24, 2009.
- U.S. Navy Awards Raytheon $93 Million Contract for Standard Missile-6 Raytheon Media Center: Press Release, September 9, 2009. Accessed November 8, 2009.
- Raytheon Delivers First Standard Missile-6 to U.S. Navy Raytheon Media Center: Press Release, April 25, 2011. Accessed April 27, 2011.
- "Defense Acquisition Board approves Standard Missile-6 full-rate production". Raytheon Company. 22 May 2013.