Suspected North Korean jamming disrupts South's GPS...

South Korea says North Korea may be to blame for disruptions to its satellite-based global positioning system that have affected air travel and shipping. South Korea's Ministry of Land, Transport and Maritime Affairs says the disruptions began last Saturday and have affected 412 aircraft leaving and arriving at Incheon and Gimpo airports. The maritime police in Incheon says ships travelling in the Yellow Sea have also been affected. A total of 122 vessels, including 8 patrol boats, have reported problems with their navigation systems. There have been no reports of safety problems stemming from the apparent jamming, because GPS plays only an assisting role in navigation. But the government is calling for caution as many small fishing boats rely solely on GPS for their navigation. A South Korean government official tells NHK that the disrupting signals apparently originate from around the North Korean city of Kaesong, near the military border between the 2 Koreas. South Korea is working to locate the source of the signals before filing a protest with the North through international organizations.
(Japan Broadcasting Corporation, 2012-05-05)