How It Works

Video: JDAM strike

Check out the power and blast impact of this GPS-guided JDAM strike.

One of the most modern guidance systems available, GPS-guided missiles – such as the JDAM and JSOW units carried by the B-1B –allow targets to be engaged accurately even in poor visibility conditions. The system works by partnering an Inertial Navigation System (INS) with a direct link to multiple Earth-orbiting satellites, that relay and feedback positional data to the missile constantly, allowing it alter its trajectory to match its intended flight path. With GPS enabled, JDAM missiles have a Circular Error Probable (CEP; a measure of how accurate they are) of just under 13 meters, however if jammed and under INS guidance only, that is more than doubled to 30 meters.


  • Steve

    Nothing like some joint direct attack munition!!