The U.S. military will be looking to a once-outdated technology as a possible response to modern cyber threats.

The technology, formally called LORAN, or long-range navigation, is a radio signal-based navigation system first developed during World War II.

Nearly all of modern military and commercial navigation is done through the use of Global Positioning System (GPS) satellite signals, which have become targeted by both hacking and jamming efforts by potential adversaries.

In the modern age of cyber-warfare, GPS is a priority target in disrupting your enemy’s ability to operate. In addition to the military applications, 90% of the world’s commercial activity and trade occurs via seaborne shipping routes. Jamming the navigation systems of those ships would almost certainly cause global economic chaos.