GPS and Navigation Warfare

A World Built on GPS

The Global Positioning System was developed by the US military in the 1970s and made available for civilian use in the 1980s. Today, GPS is embedded in everything — navigation, aviation, shipping, agriculture, banking (transaction timestamps), power grids (synchronization), and telecommunications. The US government estimates that GPS contributes over $1 billion per day to the US economy alone.

But GPS is not the only game. Russia operates GLONASS, China has BeiDou (which achieved global coverage in 2020), the EU has Galileo, India has NavIC, and Japan has QZSS. Each system represents an enormous investment — and a recognition that dependence on another nation's navigation satellites is a strategic vulnerability. China accelerated BeiDou specifically because its military planners recognized that in a conflict, the US could degrade or deny GPS signals to Chinese forces.

Jamming, Spoofing, and Denial

GPS signals are remarkably weak — by the time they reach Earth from 20,200 km altitude, they are about one ten-billionth of a watt. A relatively cheap jammer can drown out GPS signals over a wide area. A more sophisticated attacker can 'spoof' signals — transmitting fake GPS data that makes receivers calculate the wrong position.

Russia has been particularly active in GPS warfare. GPS disruptions have been documented extensively around Russian military facilities, in the Baltic and Black Seas, and during exercises. In 2018, Norway accused Russia of jamming GPS signals during a NATO exercise, affecting civilian aviation. Ships in the Black Sea have reported spoofing attacks that showed them miles from their actual position.

The military implications are severe. Precision-guided munitions depend on GPS for targeting accuracy. Without GPS, a bomb that would hit within 3 meters of its target might miss by hundreds of meters. Disrupting an adversary's GPS is one of the cheapest and most effective asymmetric warfare tactics available.