GPS jamming is leading to dead zones. What now?

The Strait of Hormuz, through which 20% of the world’s oil would usually travel, according to the U.S. Energy Information Administration, is now a GPS dead zone.

GPS signals are being jammed as a form of electronic warfare, which is one of the reasons it’s so hard for ships to traverse the strait amid war in Iran.

“Marketplace” host Amy Scott joined Christopher Mims, a technology columnist for the Wall Street Journal who wrote about GPS jamming and dead zones, to talk about what is being done about it.

To hear their conversation, click the audio player above.