Russia's jamming hinders Ukraine's rocket systems in war.

Russia has been using electronic jammers to block the GPS guided targeting system of US-made mobile rocket systems in Ukraine, causing rockets to miss their targets. Ukrainian military officials, with the US’ help, have had to come up with workarounds as they continue to use the High Mobility Artillery Rocket System (HIMARS), which has been a key piece of weaponry in Ukraine’s fight. The Russians’ intensive blocking has rendered the systems increasingly less effective, forcing US and Ukrainian officials to find ways to tweak the HIMARS’ software to counter the evolving Russian jamming efforts.