這艘潛艦命名為「英雄金建玉號」,編號841,將作為北韓海軍力量的核心水下進攻手段之一。金正恩20230906日主持盛大的下水典禮,並表示北韓計劃將其現有潛艦,轉變為攜帶核武器的攻擊潛艦,且稱加速建造核動力潛艦,並稱此新型潛艦是「推進未來海軍核武化」的一部分。

North Korea unveils first tactical, nuclear-armed submarine.

. North Korea has launched its first operational "tactical nuclear attack submarine" and assigned it to the fleet that patrols the waters between the Korean peninsula and Japan, state media said on Friday.

Submarine No. 841 - named Hero Kim Kun Ok after a North Korean historical figure - will be one of the main "underwater offensive means of the naval force" of North Korea, leader Kim Jong Un said at the launch ceremony on Wednesday.

Analysts said the vessel appears to be a modified Soviet-era Romeo-class submarine, which North Korea acquired from China in the 1970s and began producing domestically. Its design, with 10 launch tube hatches, showed it was most likely armed with ballistic missiles and cruise missiles, analysts said.

But such weapons wont add much value to the Norths more robust land-based nuclear forces, because its submarines may not survive as long during a war, said Vann Van Diepen, a former U.S. government weapons expert who works with the 38 North project in Washington..

."When this thing is field deployed, its going to be quite vulnerable to allied anti-submarine warfare," he said. "So I think from a sort of hard-headed military standpoint this doesnt make a lot of sense."

At the launch ceremony, Kim said arming the navy with nuclear weapons was an urgent task and promised more underwater and surface vessels equipped with tactical nuclear weapons for the naval forces, news agency KCNA reported.

.The submarine-launching ceremony heralded the beginning of a new chapter for bolstering up the naval force of the DPRK," KCNA said, using the initials of the Norths official name, the Democratic Peoples Republic of Korea.

North Korea plans to turn other existing submarines into nuclear armed vessels, and accelerate its push to eventually build nuclear-powered submarines, Kim said.

"Achieving a rapid development of our naval forces ... is a priority that cannot be delayed given ... the enemies recent aggressive moves and military acts," the North Korean leader said in a speech, apparently referring to the United States and South Korea.

"North Koreas military activity is posing graver and more imminent threat to our countrys security than before," Japanese Chief Cabinet Secretary Hirokazu Matsuno told a briefing.

NUCLEAR ATTACK SUBMARINE

The designation as a "tactical" submarine suggests it does not carry submarine launched ballistic missiles (SLBM) that can reach the U.S. mainland, but rather smaller, short-range SLBMs or submarine-launched cruise missiles (SLCM) capable of striking South Korea, Japan, or other regional targets, said Choi Il, a retired South Korean submarine captain.

The rear of the submarines sail - the tower that juts out of the top of the hull - was expanded and 10 vertical launch tubes, 4 large and 6 small, were installed, likely for SLBMs and SLCMs, he said.

North Korea has test-fired both SLBMs and SLCMs.

It is unclear whether North Korea has fully developed the miniaturised nuclear warheads needed for such missiles. Analysts say that perfecting smaller warheads would most likely be a key goal if the North resumes nuclear testing.

North Korea has about 20 Romeo-class submarines, which are powered by diesel-electric engines and are obsolete by modern standards, with most other countries operating them only as training vessels.

Analysts first spotted signs that at least one new submarine was being built in 2016, and in 2019 state media showed Kim inspecting a previously unreported submarine built under "his special attention" that would operate off the east coast.

State media at the time did not describe the submarines weapons systems or say where and when the inspection took place, but analysts said the apparent size of the new vessel indicated it was designed to carry missiles.

North Korea has a large submarine fleet but only the experimental ballistic missile submarine 8.24 Yongung (August 24th Hero) is known to have fired a missile.

The launching ceremony comes as North Korea is set to mark the 75th anniversary of its founding day on Saturday and follows reports that Kim plans to travel to Russia this month to meet President Vladimir Putin to discuss weapons supplies to Moscow.

South Korean President Yoon Suk Yeol on Thursday met with Chinese Premier Li Qiang in Jakarta, and asked Beijing to do more as a U.N. Security Council member to address North Koreas nuclear threat.

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