Granted, there are older weapons that don't use GPS for this purpose, but for the United States Army, it's a vital piece of equipment. Artillery is a significant aspect of the war in Ukraine ...

The U.S. Army approved the full-rate production of a Collins Aerospace-developed vehicle-mounted positioning, navigation and timing, or PNT, system vital to operating in GPS-denied environments ...

These features enable mounted soldiers to operate in environments where military GPS is denied or degraded. The system supports U.S. Army forces by allowing them to move, shoot and communicate ...