Naval Warfare

US State Department Clears Japan Maritime Self-Defense Force to Buy RAM Block 2 Tactical Missiles


The U.S. State Department has made a determination approving a possible Foreign Military Sale to the Government of Japan of RAM Block 2 Tactical Missiles and related equipment for an estimated cost of $61.5 million. Japan Maritime Self-Defense Force will have no difficulty absorbing these services and support into its armed forces.The principal contractor will be Raytheon Missiles and Defense, Tucson.

The Government of Japan has requested to buy up to forty-four (44) Rolling Airframe Missiles (RAM) Block 2 Tactical Missiles, RIM-116C. Also included are RAM Block 2 Guidance Control Groups; RAM Guided Missile Round Pack Tri-Pack shipping and storage containers; operator manuals and technical documentation; U.S. Government and contractor engineering, technical and logistics support services; and other related elements of logistics and program support.

Rolling Airframe Missile (RAM) Block 2

The RAM Block 2 is an upgraded version of the RAM missile aimed at more effectively countering more maneuverable antiship missiles through a four-axis independent control actuator system, increased rocket motor capability, an improved passive radio frequency seeker and upgraded components of the infrared seeker, and advanced kinematics. The Block 2 RAM was delivered to the U.S. Navy in August 2014, with 502 missiles to be acquired from 2015 to 2020.

The RIM-116 Rolling Airframe Missile (RAM) is a small, lightweight, infrared homing surface-to-air missile. It was intended originally and used primarily as a point-defense weapon against anti-ship cruise missiles. As its name indicates, RAM rolls as it flies. The missile must roll during flight because the RF tracking system uses a two-antenna interferometer that can measure phase interference of the electromagnetic wave in one plane only.

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