Two South Koreans arrested for espionage for North...

South Korean police have arrested 2 men in connection with the recent jamming of global positioning systems that affected much of the country's air and maritime traffic. The 2 South Korean businessmen have been charged with violating the country's national security law. Police say North Korean spies met the two men in the Chinese city of Dandong last July and instructed them to collect intelligence information. They say the suspects had made contact with people in the South Korean military industry in the hope of collecting data on jamming devices and military technology. One of the suspects, in his 70s, was on parole after having been sentenced to life in prison 30 years ago in connection with another espionage case.
Hundreds of commercial jets and ships in South Korea experienced GPS disruptions for more than 2 weeks earlier this month. The South Korean government says the North was responsible but North Korea denies any involvement.
(Japan Broadcasting Corporation, 2012-05-31)

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)

North Korea affects South Korean flights with jamming signals...

The government says North Korea has been emitting electronic jamming signals and disrupting the GPS systems of private South Korean airplanes. The Transport Ministry says the North's attack began Saturday and has affected 252 aircraft, eleven of which are foreign-flagged airliners. The jamming mainly occurred between 6 a.m. and 11 p.m. The ministry says none of the flights were endangered, and the planes have continued to operate as usual. The ministry is also looking out for maritime damage as the jamming could have affected Navy or Coast Guard vessels, cargo ships and fishing boats operating in the Yellow Sea.
(KBS World Radio, 2012-05-02)