Relations between the two Koreas are at one of their lowest points in years, with the North launching a flurry of ballistic missiles in violation of UN sanctions.
It also has been bombarding the South with trash-carrying balloons since May, in what it says is retaliation for anti-Pyongyang propaganda missives sent North by activists.
The South Korean military said Pyongyang also attempted to jam GPS signals in May, but added at the time that it did not hinder any military operations in the South.
In Friday’s drill, South Korea fired a Hyunmoo surface-to-surface short-range missile into the West Sea, which the military said was to show Seoul’s “strong resolve to firmly respond” to any North Korean threats.
The Hyunmoo missiles are key to the country’s so-called “Kill Chain” preemptive strike system, which allows Seoul to launch an attack if there are signs of an imminent North Korean attack.
“REAL RISK”
Experts say such jamming attacks can lead to other incidents that could escalate tensions on the Korean peninsula.
“It remains unclear whether there is an intention to divert the world’s attention from troop deployments, instil psychological insecurity among residents in the South, or respond to Friday’s drills,” Yang Moo-jin, president of the University of North Korean Studies in Seoul, told AFP.
“However, GPS jamming attacks pose a real risk of serious incidents, including potential aircraft accidents in the worst-case scenario.”
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