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Rolling Airframe Missile

Modern Ship Self-defense

The Rolling Airframe Missile (RAM™) Guided Missile Weapon System is the world's most modern ship self-defense weapon and is designed to provide exceptional protection for ships of all sizes. RAM is currently deployed on more than 165 ships in eight countries, ranging from 500-ton fast attack craft to 95,000-ton aircraft carriers.

RAM is a supersonic, lightweight, quick-reaction, fire-and-forget weapon designed to destroy anti-ship missiles. Its autonomous dual-mode passive radio frequency (RF) and infrared guidance design provide high-firepower capability for engaging multiple threats simultaneously. RAM is continually improved to stay ahead of the ever-evolving threat of anti-ship missiles, helicopters, aircraft and surface craft.


RAM Block 2, the latest step in the development of the Rolling Airframe Missile, is a kinematic and RF receiver upgrade of Block 1/1A. A larger, more powerful rocket motor and advanced control section make the missile two and a half times more maneuverable with one and a half times the effective intercept range. This provides the Block 2 missile with the capability to defeat high-maneuvering threats, increasing the survivability of the defended ship. An enhanced RF receiver allows detection of anti-ship missiles that employ low probability of intercept receivers.


The MK 44 Guided Missile Round Pack (GMRP) and the MK 49 Guided Missile Launching System, which hold 21 missiles, comprise the MK 31 Guided Missile Weapon System. The system is designed for flexibility in ships' integration, with no dedicated sensors required. A variety of existing ship sensors can readily provide the target and pointing information required to engage the anti-ship threat.

The MK 44 is also the missile used in the SeaRAM Anti-Ship Missile Defense System, replacing the M601A1 Gatling gun in the Phalanx Close-In Weapon System with an 11-round launcher. The Phalanx sensor suite serves as the search and track radar designating the threat for RAM missiles to intercept. RAM Block 2 has been successfully fired from SeaRAM.


RAM is an international cooperative program between the United States and Germany. Development, production and maintenance costs are shared among Raytheon Company in the United States and the German companies LFK, DBD and RAMSYS. Licensed production of the RAM GMRP is also underway in Korea.

Learn more about Raytheon's Precision Weapons.

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