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S. Korea to set up GPS jamming surveillance system
By Lee Minji
SEOUL, April 10 (Yonhap) -- Amid growing war threats from North Korea, South Korea plans to beef up its surveillance system against the North's provocative electronic jamming signals that have targeted civilian facilities in the past, sources said Wednesday.

In addition to cyber attacks on South Korean networks, the North has been disrupting global positioning system (GPS) signals since 2010. GPS is a satellite-based navigation system widely used by planes, ships and vehicles.