GPS interference over the East Asian seas
Updated
In the 24 hours to , 93 map hexagons in this region had enough air traffic to measure. 10 showed high interference, where more than 10% of aircraft reported low GPS accuracy, 9 medium (3–10%) and 74 low (under 3%).
The live map
Today in numbers
Across these hexagons, 31 of 1,160 aircraft observations (2.7%) reported low accuracy. An aircraft that crossed several hexagons is counted once in each.
| Level | Share of aircraft affected | Hexagons |
|---|---|---|
| High | over 10% | 10 |
| Medium | 3–10% | 9 |
| Low | under 3% | 74 |
Most affected hexagons
| Hexagon centre | Share affected | Aircraft affected |
|---|---|---|
| 25.4°N 124.8°E | 33.3% | 1 of 3 |
| 13.7°N 122.4°E | 25.0% | 1 of 4 |
| 35.6°N 126.0°E | 20.0% | 1 of 5 |
| 15.1°N 120.0°E | 16.7% | 1 of 6 |
| 32.1°N 130.8°E | 13.3% | 2 of 15 |
Area covered
This page covers 5°N to 43°N and 105°E to 135°E, which takes in the contested waters of the Yellow Sea, East China Sea, Taiwan Strait and South China Sea: the Korean Peninsula, eastern China, Taiwan and the Philippines. A hexagon is included when its centre falls inside that area.
Background
The waters around the Philippines, Taiwan, the Korean Peninsula and China are among the most contested in the world, and satellite-navigation interference has been reported at several points in them. South Korea's military said in November 2024 that North Korea had jammed GPS signals from the Haeju and Kaesong areas, affecting ships and dozens of civilian aircraft in the Yellow Sea (Al Jazeera, November 2024). The Philippine Coast Guard has accused Chinese vessels of faking their tracked positions (Marine Insight); that is a falsified ship-tracking signal, not interference with aircraft, and the map cannot show it. These are reports of particular incidents, not a measure of who is responsible for any pattern on the map. For other conflicts that may lie behind interference elsewhere, see the conflict section of the causes page.
About these figures. They count aircraft that reported low GPS accuracy (ADS-B NACp of 7 or lower), which is a strong sign of jamming or spoofing but not proof of it. The map cannot locate a transmitter or say who is responsible. How the map is made.