MANILA, July 8 — For millions of families across Asia, from the tricycle drivers of Manila navigating the city’s tangled side streets to the fishing boats of the Visayas finding their way home through the open sea, the Global Positioning System has become a quiet, invisible companion. But the system that now guides us so precisely did not begin as a tool for the public. It started as a military project, its signals deliberately degraded for anyone outside the United States armed forces.
The story of GPS reaches back to earlier U.S. military navigation systems, including the TRANSIT system, which became operational in 1964, and the Timation program. The concept for a more advanced system was proposed by the U.S. Air Force in the early 1970s.
The first satellite in this new constellation, Navstar 1, was launched on February 22, 1978, aboard an Atlas F rocket from Vandenberg Air Force Base. It would take years and many more launches before the system was ready for widespread use. On December 8, 1993, the system was declared to have initial operational capability, with 24 satellites in orbit.
Full operational capability was achieved on July 17, 1995. But for all those years, the system was restricted primarily to military use.
Civilian access was deliberately degraded through a policy called Selective Availability, which introduced intentional timing errors into the signal. For a person on the ground, this meant accuracy was only about 100 meters — enough to find a neighbourhood, but not a specific house. That changed on May 1, 2000, when President Bill Clinton ordered Selective Availability to be turned off.
The decision dramatically improved civilian accuracy from about 100 meters to between 5 and 10 meters. The move had been formalised in a 1996 presidential decision directive, but it took four years to implement. For communities across the Philippines and the wider region, the effect was immediate: suddenly, a device in your pocket could pinpoint your location with remarkable precision.
From military asset to everyday tool
The first commercial GPS receiver for consumers, the Magellan NAV 1000, was introduced in 1989 at a price of $3,000. That was a steep cost for most families, but it signalled the beginning of a transformation. The 1996 FAA authorisation encouraged the use of GPS in aviation, opening the door for safer flights and more efficient routes.
The 2004 U.S. Space-Based Positioning, Navigation, and Timing Policy formally established GPS as a national asset, recognising its growing importance to civilian life and global commerce. Today, the system is operated by the U.S. Space Force’s 2nd Space Operations Squadron at Schriever Air Force Base.
Key figures in its development include Bradford Parkinson, the U.S. Air Force colonel who led the initial program; Ivan Getting, president of The Aerospace Corporation; and Roger L. Easton of the Naval Research Laboratory, who contributed to the Timation program. Their work laid the foundation for a technology that now touches nearly every aspect of modern life.
For communities across Asia, GPS has become essential not just for navigation, but for agriculture, disaster response, and logistics. Farmers in the rice terraces of Luzon use satellite-guided tractors to plant with precision.
Relief workers in typhoon-ravaged provinces rely on GPS coordinates to deliver aid to isolated villages. Ride-hailing drivers and commuters alike depend on real-time location data to navigate congested city streets. The system that once deliberately kept its accuracy from civilians now helps families find their way home.
Looking ahead, the continued evolution of GPS and its integration with other satellite navigation systems — such as Russia’s GLONASS, Europe’s Galileo, and China’s BeiDou — promises even greater accuracy and reliability for users across the region. The technology that began as a military advantage has become a shared resource, quietly guiding the daily journeys of millions.
