North Korea's Submarines Are Busy

North Korean leader Kim Jong-un watches the test-fire of a strategic submarine underwater ballistic missile in 2015. Photo: Reuters

CNN: US detects 'highly unusual' North Korean submarine activity

Washington (CNN)The US military has detected "highly unusual and unprecedented levels" of North Korean submarine activity and evidence of an "ejection test" in the days following Pyongyang's second intercontinental ballistic missile launch this month, a defense official told CNN on Monday.

An ejection test examines a missile's "cold-launch system," which uses high pressure steam to propel a missile out of the launch canister into the air before its engines ignite. That helps prevent flames and heat from the engine from damaging either the submarine, submersible barge or any nearby equipment used to launch the missile.

Carried out on land at Sinpo Naval Shipyard, Sunday's ejection test is the third time this month -- and fourth this year -- that North Korea has conducted a trial of the missile component that is critical to developing submarine launch capabilities, according to the US defense official.

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WNU Editor: These reports of sub activity have been circulating for the past ten days .... Is North Korea Preparing A Missile Test From A Submarine? (July 21, 2017).

More News On Reports of North Korean Submarine Activity

The U.S. Military Has Detected 'Highly Unusual' North Korean Submarine Activity -- Time
‘Highly unusual’ North Korean submarine activity spotted by US military -- South China Morning Post
US detects North Korea committing 'highly unusual' submarine activity: Report -- Washington Examiner
'Unusual' activity in North Korean submarine could signal another missile test -- International Business Times
U.S. Watching Suspicious N.Korean Sub -- Chosun Ilbo