But the Korean military weaponry still largely remains vulnerable to GPS jamming signals, said Kwon Oh-Bong of the Defense Acquisition Program Administration, answering questions from concerned politicians at a parliamentary working session Monday.
"Because we have a special code for the military, it is unlikely to be affected by such an attack, but there are some weapons that do not require a special code, so we are researching preventive measures," he said.
U.S. Forces Korea spokesman David Oten declined to assess the effects, saying it is a matter of intelligence but added in an e-mail response that they are conducting extensive analysis of potential threats and ensured that "United States forces operate using multiple, redundant navigational systems and train extensively to operate in a contested electronic environment."
Euri Son and Esther Kim contributed to this article.