North Korea only SSB, Sinpo-class SSB.
With the Republic of Korea Navy currently operating the Type 209 and 214 submarines, the Moon Jae-in government is moving to build nuclear-powered submarines to better deter threats from North Korea's submarine-launched ballistic missiles. / Graphic by Cho Sang-won
One of the drones flew as far as the northern Seoul metropolitan area Monday afternoon before returning to North Korea about three hours later. But the South’s military lost track of the other four aircraft and they have not been found, according to officials.
In a statement Tuesday, South Korea’s Joint Chiefs of Staff admitted that the country’s air defenses are better equipped to detect and strike North Korea’s armed drones, which are larger and pose a bigger threat. The surveillance drones sent Monday were less than 3 meters long, it said.