RIM-2 Terrier on board USS Boston (CAG-1)
|Type||Medium Range Surface-to-air missile|
|Place of origin||United States|
|Used by||United States Navy, and Others.|
|Manufacturer||Convair - Pomona, California Division|
|Weight||3000 lb (1360 kg) (missile: 1180 lb, booster: 1820 lb) (535 and 825 kg)|
|Length||27 ft (8.23 m)|
|Warhead||218 lb (99 kg) controlled-fragmentation|
|Engine||Solid fuel rocket|
|Propellant||Solid Rocket Fuel|
|17.3 nm (32 km)|
|Flight ceiling||80,000 ft (24,400 m)|
|Semi-active radar homing|
The Convair RIM-2 Terrier was a two-stage medium-range naval surface-to-air missile (SAM), and was among the earliest surface-to-air missiles to equip United States Navy ships. It underwent significant upgrades while in service, starting with a beam-riding system with 10 nm range at a speed of Mach 1.8, and ending as a semi-active radar homing system with a range of 40 nm at speeds as high as Mach 3. It was replaced in service by the RIM-67 Standard ER (SM-1ER).
Terrier has also been used as a sounding rocket, typically as a first stage, for conducting research. The Terrier can be equipped with various upper stages, like the Asp, the Tomahawk (not to be confused with the similarly named cruise missile) or the Orion. The booster also served as the basis for the MIM-3 Nike Ajax booster, which was slightly larger but otherwise similar, which has also seen widespread use in sounding rockets.
The Terrier was a development of the Bumblebee Project, the Navy's effort to develop a surface-to-air missile to provide a middle layer of defense against air attack (between carrier fighters and antiaircraft guns). It was test launched from USS Mississippi (AG-128) ex (BB-41) on January 28, 1953, and first deployed operationally on the Boston class cruisers, USS Boston (CAG-1) and USS Canberra (CAG-2) in the mid-1950s, with the Canberra being the first to achieve operational status June 15, 1956. Its US Navy designation was SAM-N-7 until 1963 when it was re-designated RIM-2.
For a brief time during the mid-1950s the USMC had two Terrier battalions equipped with specially modified twin sea launchers for land use that fired the SAM-N-7. The Terrier was the first surface to air missile operational with the USMC. The launchers were reloaded by a special vehicle that carried two Terrier reloads. 
Initially, the Terrier used radar beam-riding guidance, wing control, and a conventional warhead. It had a top speed of only Mach 1.8, a range of only 10 nautical miles (19 km), and was only useful against subsonic targets. Originally, the Terrier had a launch thrust of 23 kN (5,200 lbf), and weight of 1392 kg (3,069 lb). Its original dimensions were a diameter of 340 mm, a length of 8.08 m, and a fin span of 1.59 m. Cost per missile in 1957 was an estimated $60,000 dollars. 
Before it was even in widespread service it was seeing major improvements. The RIM-2C, named the Terrier BT-3 (Beam-riding, Tail control, series 3) was introduced in 1958. The wings were replaced with fixed strakes, and the tail became the control surface. The BT-3 also had a new motor, and featured extended range, Mach 3 speed, and better maneuverability. The RIM-2D Terrier BT-3A(N) used a W45 1kt nuclear warhead, but all other variants used a 218 lb (99 kg) controlled-fragmentation warhead.
The RIM-2E introduced semi-active radar homing, for greater effectiveness against low-flying targets. The final version, the RIM-2F, used a new motor which doubled effective range to 40nm.
The Terrier was the primary missile system of most US Navy cruisers built during the 1960s. It could be installed on much smaller ships than the much larger and longer-ranged RIM-8 Talos. A Terrier installation typically consisted of the Mk 10 twin-arm launcher with a 40-round rear-loading magazine, but some ships had extended magazines with 80 or 120 rounds, and the installation in the Boston and Canberra used a bottom-loading magazine of 72 rounds.
The French Navy's Masurca missile was developed with some technology provided by the USN from Terrier.
|Designation||Early Designation||Control Surfaces||Guidance||Notes|
|RIM-2A||BW-0||Wing Control||Beam-Riding||Subsonic targets only|
|RIM-2B||BW-1||Wing Control||Beam-Riding||Subsonic targets only|
|RIM-2C||BT-3||Tail Control||Beam-Riding||In Service 1958, supersonic targets|
|RIM-2D||BT-3A(N)||Tail Control||Beam-Riding||W45 Nuclear 1kT yield|
|RIM-2E||HT-3||Tail Control||Semi-active radar homing||Introduced Semi-Active Homing|
|RIM-2F||Tail Control||Semi-active radar homing||New Rocket Motor|
USS Canberra (CAG-2) launching a Terrier, 1960.
RIM-2 aboard USS Providence (CLG-6), 1962.
Early Model Terrier launched from test vessel USS Mississippi.
RIM-2 launch from USS Constellation (CVA-64), 1962.
Terrier launch from USS Dale (DLG-19), 1964.
- General Dynamics (Convair) SAM-N-7/RIM-2 Terrier
Media related to RIM-2 Terrier at Wikimedia Commons
- "US Marines Terrier" YouTube video