A total of 2,143 jamming attacks on South Korea have been launched from the territory of the DPRK since 2010, Minjoo Party member Jun Hyeon-hee said, as quoted by JoongAng Ilbo newspaper. The jamming signals were sent from sites in five North Korean provinces, including Haeju, Yonan, Pyonggang, Kumgang and Kaesong.
While North Korea's jamming attacks haven't led to any major incidents to date, four South Korean planes in 2012 failed to land on the first pass as a result of navigation system issues, according to the country's Ministry of Transportation information.
"[There have]not yet been an accident involving a commercial airliner, but because of GPS interference there have been planes that had to reattempt [landings]," Jun said to reporters.
The GPS jamming attacks on South Korea coincide with military exercises in the country, ordinarily co-participated by the US military.
During the drills over a hundred cases of jamming were reported, Yonhap News Agency wrote, adding that some 962 planes and 700 fishing boats experienced troubles with their GPS systems.
South Korean authorities claimed that the Inertial Navigation System (INS) used in all the country's aircraft prevented critical disruptions of equipment and subsequent incidents.
To address the potential jamming threats coming from Pyongyang Jun called for a "proactive response system" in South Korea.