An American-designed guided air-delivered bomb which has a maximum effective range of 111 km. Produced by Raytheon, it is sometimes referred to by its earlier name, ‘Small Diameter Bomb II’. The StormBreaker is a 250-pound-class munition which uses GPS and inertial navigation—as well as a trimode seeker which can use millimeter wave radar, imaging infrared, and semi-active radar homing—for guidance. This gives it the ability to strike targets, including moving targets, in poor weather conditions. It has been in service with the U.S. Navy and U.S. Air Force since 2020, and has seen use during American strikes targeting the Houthis in Yemen in 2025.