America’s Military Has a GPS Problem

“The Department of Defense’s (DoD) Global Positioning System (GPS) is the principal source of positioning, navigation, and timing (PNT) information for the U.S. military and civilian users. Due to DoD’s reliance on it, GPS also represents a potential single point of failure for DoD. We [the Government Accountability Office (GAO)] previously reported on DoD’s efforts to modernize GPS with a more jam resistant, encrypted, military-specific signal, referred to as military code (M-code), and we found that DoD is years away from fielding this capability after spending more than two decades and billions of dollars.”That was the opening of a GAO letter sent last Wednesday to Congress accompanying a 58-page report titled PRECISION NAVIGATION SYSTEMS: Challenges Remain with Fielding New Capabilities, which explains the key role that GPS delivery of PNT data plays in this country’s military and civilian activities -- and the need to update the system.The M-code secure, jam-resistant GPS signal is designed to be used by roughly 700 U.S. weapons systems deployed by Army, Navy, Marine Corps and Space Force services, but because of a limited supply of specialized microchip sets and production bo...