SM-3 Block IB Missile

Full Specifications

SM 3 Block IB Naval Missile Defense Interceptor

The Standard Missile-3 Block IB is a ship based ballistic missile defense interceptor developed for the Aegis Ballistic Missile Defense System. It is designed to intercept and destroy short to intermediate range ballistic missiles during the midcourse phase of flight, outside the Earth’s atmosphere.

Unlike conventional missiles that use explosive warheads, the SM 3 Block IB relies on kinetic energy. Its kill vehicle collides directly with an incoming ballistic missile at extremely high speeds. This hit to kill approach increases precision while reducing the risk of debris carrying explosive payloads.

The interceptor is primarily deployed aboard U.S. Navy destroyers and cruisers equipped with the Aegis combat system. It also supports land based missile defense through the Aegis Ashore installations. The missile forms a key layer of the United States and allied ballistic missile defense architecture.

Manufacturer

The SM 3 Block IB was developed jointly by Raytheon Technologies and Lockheed Martin for the United States Navy and the Missile Defense Agency.

Raytheon serves as the prime contractor responsible for missile integration and production, while Lockheed Martin provides the advanced guidance components and combat system integration. The interceptor represents an upgraded variant of the earlier SM 3 Block IA, featuring improved target discrimination and maneuverability.

Speed and Range

The SM 3 Block IB interceptor reaches speeds exceeding Mach 10 during flight. This extremely high velocity allows the missile to intercept ballistic targets in the midcourse phase, typically outside the atmosphere.

Its operational intercept range is estimated at more than 700 kilometers, with engagement altitudes reaching up to roughly 500 kilometers depending on the trajectory and sensor data provided by the Aegis radar network.

The missile uses a third stage rocket motor to deploy the kinetic warhead known as the kinetic warhead vehicle, which then uses infrared sensors and divert thrusters to guide itself directly into the target.

Cost

The estimated unit cost of the SM 3 Block IB interceptor ranges between 10 million and 12 million dollars per missile depending on production batch size and configuration. Procurement programs are funded through the U.S. Missile Defense Agency and deployed across U.S. Navy Aegis equipped vessels and allied missile defense sites.