The AGM-158 JASSM (Joint Air-to-Surface Standoff Missile) is a conventional, air-to-ground and precision standoff missile. Its stealthy design and standoff range enables the JASSM to strike a wide range of valuable targets without entering hostile air defense zone. The JASSM project started as a joint U.S. Air Force and Navy project, but the Navy first postponed, then cancelled the procurement of the missiles.
The AGM-158A is a stealthy cruise missile powered by a turbojet. It uses flip-out wings with control surfaces and a single vertical tail for flight control. It is guided by a jamming-resistant GPS-aided inertial navigation system, and uses an IIR (Imaging Infrared) seeker for autonomous pattern-based target selection and terminal homing. The missile is armed with a WDU-42/B insensitive munitions penetrating warhead and is also equipped with a data link to transmit status and location information until impact to assist bomb damage assessment.
The AGM-158B JASSM-ER is the extended-range version. It features around double the range of the baseline AGM-158 JASSM due to a more efficient turbofan engine and a larger internal fuel tank. However external dimensions of this missile are the same.
The AGM-158C Long Range Anti-Ship Missile (LRASM) is an anti-ship cruise missile, based on the AGM-158B JASSM-ER. The missile can either be launched from aircraft or, once fitted with a rocket booster it can be fired from the Mk-41 Vertical Launching System, which is used on many US warships.