GBU-38 is a variant of which munition program?

• A. A standalone unguided bomb
• B. A laser-guided bomb variant
• C. An infrared-guided missile
• D. A JDAM variant

Answer: (D)

GBU-38 is a variant of the JDAM program. JDAM, or Joint Direct Attack Munition, adds a GPS-aided inertial guidance system to standard unguided bombs, turning them into precision-guided munitions that work in all weather without requiring a laser designator. The GBU-38 is the 500-pound GPS-guided variant produced under this program, using a JDAM tail kit to deliver precise impact. Laser-guided bombs (like Paveways) and infrared-guided missiles are different guidance families, while an unguided bomb lacks the JDAM upgrade.