Which weapon is a 500-pound bomb with GPS/INS guidance packaged as a JDAM?

• A. GBU-38
• B. GBU-54
• C. AGM-65E2
• D. AGR-20

Answer: (A)

JDAM is a guidance kit that turns a standard unguided bomb into a precision weapon by adding GPS/INS guidance and control fins. For the 500-pound class, the kit sold for that bomb is designed to provide accurate, all-weather delivery using GPS updates supplemented by inertial navigation, so the bomb can reach a precise target even in degraded GPS conditions.

The 500-pound bomb with GPS/INS packaged as a JDAM is the GBU-38. It is the standard 500-pound JDAM that relies on GPS/INS guidance alone to steer to the coordinates. The GBU-54, by contrast, adds a laser guidance option (Laser JDAM) for terminal guidance, which is why it isn’t the pure GPS/INS variant. The AGM-65E2 is a Maverick missile with its own guidance system, not a JDAM, and the AGR-20 is a different type of guided munition. So the best match for a 500-pound bomb using GPS/INS guidance packaged as a JDAM is the GBU-38.