RIM-66 Standard

a RIM-66 on a Mk 26 missile launcher

### Users

Australia, Chile, Denmark, Egypt, Germany, Iran, Italy, Japan, Netherlands, Poland, Pakistan, South Korea, Spain, Taiwan, Turkey, USA (current), Canada, France, Greece (former)

### Designer

General Dynamics

The **RIM-66 Standard MR** (SM-1MR/SM-2MR) is a medium-range surface-to-air missile (SAM), with a secondary role as an anti-ship missile, developed for the United States Navy (USN). A member of the Standard Missile family of weapons, the SM-1 was developed as a replacement for the RIM-2 Terrier and RIM-24 Tartar that were deployed in the 1950s on a variety of USN ships. The RIM-67 Standard (SM-1ER/SM-2ER) is an extended range version of this missile with a solid rocket booster stage.

### Description

The Standard missile program was started in 1963 to produce a family of missiles to replace existing guided missiles used by the Terrier, Talos, and Tartar guided missile systems. The intention was to produce a new generation of guided missiles that could be retrofit to existing guided missile systems.

#### Standard Missile 1

The RIM-66A is the medium ranged version of the Standard missile and was initially developed as a replacement for the earlier RIM-24C as part of the Mk74 "Tartar" Guided Missile Fire Control System. It used the same fuselage as the earlier Tartar missile, for easier use with existing launchers and magazines for that system. The RIM-66A/B while looking like the earlier RIM-24C on the exterior is a different missile internally with redesigned electronics and a more reliable homing system and fuze that make it more capable than its predecessor. The RIM-66A/B Standard MR, (SM-1MR Block I to V) was used during the Vietnam War. The only remaining version of the Standard missile 1 in service is the RIM-66E (SM-1MR Block VI). While no longer in service with the USN, the RIM-66E is still in service with many navies globally and is expected to remain in service until 2020.

#### Standard Missile 2

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). The SM-2MR introduced inertial and command mid-course guidance. The missile's autopilot is programmed to fly the most efficient path to the target and can receive course corrections from the ground. Target illumination for semi-active homing is needed only for a few seconds in the terminal phase of the interception. This capability enables the Aegis combat system and New Threat Upgrade equipped vessels to time share illumination radars, greatly increasing the number of targets that can be engaged in quick succession.

The SM-1 and SM-2 were continuously upgraded through Blocks. In the middle 1980s, the SM-2MR was deployed via Mk 41 Vertical Launch System (VLS) aboard USS *Bunker Hill*, the first U.S. Navy ship to deploy a vertical launcher. VLS has, since 2003, been the only launcher used for the Standard missile in the U.S. Navy aboard *Ticonderoga*-class cruisers and *Arleigh Burke*-class destroyers. They are now most commonly launched from the Mk 41 VLS, which is a modular design concept with different versions that vary in size and weight. There are three lengths for this VLS: 209 in (530 cm) for the self-defense version, 266 in (680 cm) for the tactical version, and 303 in (770 cm) for the strike version. The empty weight for an 8-cell module is 26,800 lb (12,200 kg) for the self-defense version, 29,800 lb (13,500 kg) for the tactical version, and 32,000 lb (15,000 kg) for the strike version.

The Standard can also be used against ships, either at line-of-sight range using its semi-active homing mode, or over the horizon using inertial guidance and terminal infrared homing.

The SM-2 has conducted more than 2,700 successful live firings. In June 2017, Raytheon announced it was restarting the SM-2 production line to fulfill purchases made by the Netherlands, Japan, Australia, and South Korea. Production had stopped in 2013 from lack of international orders. New deliveries of SM-2 Block IIIA and IIIB missiles are scheduled to begin in 2020. The United States Navy is committed to keeping the Standard Missile 2 medium-range viable until 2035.

### Contractors

Standard missiles were constructed by General Dynamics Pomona Division until 1992, when it became part of the Hughes Missile Systems Company. Hughes formed a joint venture with Raytheon called Standard Missile Company (SMCo). Hughes Missile Systems was eventually sold to Raytheon making it the sole contractor.

Due to the end of the US Navy's support of the SM-1 missile system the National Chung-Shan Institute of Science and Technology has taken over support for the system in Taiwanese service including production of replacement rocket motors. The same approach was taken for the SM-1's Mark 13 missile launcher.

### Operational History

The Standard Missile One became operational in 1968. The missile was utilized by ships equipped with the Tartar Guided Missile Fire Control System. The missile saw its first combat use in the early 1970s in the Vietnam war.

The Standard Missile Two became operational in the late 1970s and was deployed operationally with the Aegis Combat System in 1983. Both Standard One and Two were used against both surface and air targets during Operation Praying Mantis. On July 3, 1988, USS *Vincennes* mistakenly shot down Iran Air Flight 655, an Airbus A300B2, using two SM-2MRs from her forward launcher. In 1988 the Iranian *Kaman*-class missile boat *Joshan* was disabled by RIM-66s.

On 9 October 2016, the *Arleigh Burke*-class destroyer USS *Mason* fired two SM-2s, as well as one Evolved Sea Sparrow Missile, at two incoming Houthi anti-ship missiles off the coast of Yemen, one of which struck the water on its own. It is unknown if the SM-2s were responsible for intercepting the second cruise missile. On 12 October, *Mason* again came under attack by an anti-ship missile, and an SM-2 she fired was confirmed to have intercepted it at a range of 8 miles. This marked the first time in history a warship successfully defended itself with SAMs launched from vertical launch cells against an anti-ship missile. The ship experienced yet a third attack on 15 October, this time with 5 AShMs. She fired SM-2s, destroying four of the missiles.

On 1 April 2020, a Turkish Navy G-class frigate fired at least a SM-1MR Block VIA RIM-66E-05 supposedly against an UAV operated in support of the Libyan National Army. The missile missed and landed near al-Ajaylat, just southwest of Sabratha.

On 19 October 2023, the USS *Carney*  fired SM-2s to shoot down three land-attack cruise missiles and eight drones launched from Houthi-controlled territory in Yemen. The interceptions occurred over the Red Sea; although the ship wasn't threatened, the missiles were headed north towards Israel following the start of the 2023 Israel-Hamas War.