
The South Korean Navy reported on Saturday its discovery of large buoys near the 123-degree east longitude line, west of Ieodo reef. The installations sit in international waters within China's exclusive economic zone, directly adjacent to South Korea's maritime boundaries.
Since 2018, China has deployed 10 observation buoys measuring about 3 meters wide and 6 meters tall throughout the Provisional Measures Zone (PMZ) under the stated purpose of marine observation. The latest additions bring the total count to 13 buoys, with one positioned inside the disputed fishing zone shared by both nations.
While Beijing claims the buoys serve meteorological and oceanographic purposes, South Korean defense analysts fear the equipment could monitor South Korean naval vessels and submarines, potentially compromising Seoul's maritime security operations in its own backyard waters.
China has systematically expanded its presence in the contested zone, installing large-scale aquaculture facilities described as deep-sea fishing operations. This month, Beijing declared parts of the area off-limits to navigation while announcing planned military exercises.
"We are closely monitoring China's unauthorized installation of structures within the PMZ and will work closely with relevant ministries and agencies to protect our maritime sovereignty," a Ministry of National Defense official said.
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