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A South Korean navy P-8A Poseidon at the Pohang Aviation Command in Pohang, South Korea, July 1, 2025.

A South Korean navy P-8A Poseidon at the Pohang Aviation Command in Pohang, South Korea, July 1, 2025. (South Korea Navy)

CAMP HUMPHREYS, South Korea – Six P-8A Poseidon maritime patrol planes were inaugurated into South Korea’s navy Thursday in hopes of better detecting sea-based threats in and around the Korean Peninsula.

The twin-engine aircraft, delivered in June 2024, began flying for the South Korean navy Thursday, the service said in a news release the same day.

South Korean pilots, crew members and mechanics familiarized themselves with the aircraft for a year before reporting to the fleet for operations, according to the navy.

South Korea’s military purchased six Poseidons from the United States for roughly $1.6 billion in 2018. The aircraft is meant to replace the South Korean navy’s aging fleet of P-3 Orions, which have been in service since 1995.

All P-3 flights in South Korea were paused May 29, after one of the jets crashed into the side of a mountain in Pohang, about 170 miles southeast of Seoul. All four crew members were killed.

The U.S. began replacing its P-3s with the P-8As in 2012. The Navy operates around 120 P-8As as of last year, according to the service’s website.

Based on Boeing’s 737-800 platform, the P-8A can fly at a maximum altitude of 41,000 feet and has a top speed of 490 knots, according to the company’s website.

While its primary purpose is for maritime surveillance and submarine detection, the Poseidon can be equipped with anti-submarine torpedoes and Harpoon anti-ship missiles.

Other countries to use the Poseidon include Australia, Germany, India, New Zealand, Norway and the United Kingdom.

A U.S. Navy P-8A took its first flight over South Korean airspace during a five-day joint exercise starting March 27, 2014, according to a U.S. Forces Korea news release at the time.

The P-8A’s introduction comes after North Korea flexed its maritime might in recent months.

On March 8, the state-run Korean Central News Agency reported the military was building its first nuclear-powered submarine and published photos of leader Kim Jong Un inspecting the supposed vessel at an undisclosed location.

The communist regime operates nearly 100 diesel-powered submarines, according to the South’s military, which have a limited range and are easier to detect compared to its nuclear-powered counterpart.

North Korea also launched a new 5,000-ton destroyer with “new generation” attack capabilities, KCNA reported June 13. The media outlet reported the ship was fully repaired and relaunched after it capsized three weeks earlier, a claim that independent experts have disputed. 

author picture
Yoojin Lee is a correspondent and translator based at Camp Humphreys, South Korea. She graduated from Korea University, where she majored in Global Sports Studies. 
David Choi is based in South Korea and reports on the U.S. military and foreign policy. He served in the U.S. Army and California Army National Guard. He graduated from the University of California, Los Angeles.

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