Revamping an old technology to go where GPS signals cannot reach

Illegal GPS jammers, sold cheap online, can endanger space stations and ship navigation, not to mention potentially preventing emergency calls or keeping rescue teams from homing in on injured people. But recently, a new version of an old, longwave technology, eLORAN, is showing great promise in jamming the jammers.

Read more: Revamping an old technology to go where GPS signals cannot reach