What feature does the GBU-39 utilize to enhance its lethality?

The feature that enhances the lethality of the GBU-39 is its smart seeker technology. The GBU-39, commonly known as the Small Diameter Bomb (SDB), employs advanced guidance systems that allow it to accurately target and engage various types of threats. This technology includes a GPS/INS (Global Positioning System/Inertial Navigation System) that provides precision strike capability, significantly increasing the bomb's effectiveness against hardened targets.

By using smart seeker technology, the GBU-39 can effectively navigate to its intended target and make adjustments during the flight to ensure impact accuracy. This level of precision not only increases the likelihood of destroying the target but also helps minimize collateral damage in populated areas or near sensitive structures. The inclusion of this technology distinguishes the GBU-39 from munitions that rely solely on traditional explosive mechanisms.