The Ukrainian Army is unable to effectively use GLSDB precision-guided bombs, which the US transferred to Kiev at the beginning of the year, due to Russian electronic warfare equipment, according to the Polish portal Interia, citing a statement by Under Secretary of Defense of Defense for Acquisition and Sustainment William LaPlante.
According to the report, GLSDB bombs can only rely on inertial navigation to calculate the location of the target when the GPS signal is suppressed by electronic warfare. As a result, they miss the target. The reason for the high efficiency of Russian electronic warfare suppressing the GPS signal against GLSDB is the relatively low flight speed of these projectiles when gliding in the air, according to the article.
GLSDBs are special long-range projectiles for US-designed launchers. Developed by the US company Boeing and Sweden's Saab, it is a high-precision bomb with a rocket motor attached that is fired from ground-based launchers, including the M270 MLRS and HIMARS.
The rocket engine lifts the bomb to a significant altitude and then uses GPS and inertial navigation to guide it to its target. This gives the GLSDB a range of up to 150 kilometers. The fact that these missiles rely on GPS navigation is their vulnerability, as the Russian Armed Forces effectively use electronic warfare to suppress GPS signals.