Raytheon awarded $12.3M contract for HARM upgrade The U.S. Air Force awarded Raytheon a $12.3M contract to begin full rate production of High-Speed Anti-Radiation Missile (HARM) Control Section Modification upgrade units. Raytheon received the award as the result of a down-select competition. The modification adds a GPS receiver and an improved inertial measurement unit for precision navigation to the existing HARM. HCSM also features a digital flight computer that merges targeting solutions from navigation and seeker systems. These enhancements improve the probability of hit, while controlling where the missile can and cannot fly.