China’s Submarines Add Nuclear-Strike Capability, Altering Strategic Balance

Chinese Nuclear Submarine

One Sunday morning last December, China’s defense ministry summoned military attachés from several embassies to its monolithic Beijing headquarters.

To the foreigners’ surprise, the Chinese said that one of their nuclear-powered submarines would soon pass through the Strait of Malacca, a passage between Malaysia and Indonesia that carries much of world trade, say people briefed on the meeting.

Two days later, a Chinese attack sub—a so-called hunter-killer, designed to seek out and destroy enemy vessels—slipped through the strait above water and disappeared. It resurfaced near Sri Lanka and then in the Persian Gulf, say people familiar with its movements, before returning through the strait in February—the first known voyage of a Chinese sub to the Indian Ocean.

The message was clear: China had fulfilled its four-decade quest to join the elite club of countries with nuclear subs that can ply the high seas. The defense ministry summoned attachés again to disclose another Chinese deployment to the Indian Ocean in September—this time a diesel-powered sub, which stopped off in Sri Lanka.

China’s increasingly potent and active sub force represents the rising power’s most significant military challenge yet for the region. Its expanding undersea fleet not only bolsters China’s nuclear arsenal but also enhances the country’s capacity to enforce its territorial claims and thwart U.S. intervention.

China is expected to pass another milestone this year when it sets a different type of sub to sea—a “boomer,” carrying fully armed nuclear missiles for the first time—says the U.S. Office of Naval Intelligence, or ONI.

China is hardly hiding its new boomers. Tourists could clearly see three of them at a base opposite a resort recently in China’s Hainan province. On the beach, rented Jet Skis were accompanied by guides to make sure riders didn’t stray too close.

These boomers’ missiles have the range to hit Hawaii and Alaska from East Asia and the continental U.S. from the mid-Pacific, the ONI says.

“This is a trump card that makes our motherland proud and our adversaries terrified,” China’s navy chief, Adm. Wu Shengli, wrote of the country’s missile-sub fleet in a Communist Party magazine in December. “It is a strategic force symbolizing great-power status and supporting national security.”

To naval commanders from other countries, the Chinese nuclear sub’s nonstop Indian Ocean voyage was especially striking, proving that it has the endurance to reach the U.S. Pacific Fleet’s headquarters in Hawaii.

“They were very clear with respect to messaging,” says Vice Adm. Robert Thomas, a former submariner who commands the U.S. Seventh Fleet, “to say that, ‘We’re a professional navy, we’re a professional submarine force, and we’re global. We’re no longer just a coastal-water submarine force.’ ”

In recent years, public attention has focused on China’s expanding military arsenal, including its first aircraft carrier and stealth fighter. But subs are more strategically potent weapons: A single one can project power far from China and deter other countries simply by its presence.

China’s nuclear attack subs, in particular, are integral to what Washington sees as an emerging strategy to prevent the U.S. from intervening in a conflict over Taiwan, or with Japan and the Philippines—both U.S. allies locked in territorial disputes with Beijing.

And even a few functional Chinese boomers compel the U.S. to plan for a theoretical Chinese nuclear-missile strike from the sea. China’s boomer patrols will make it one of only three countries—alongside the U.S. and Russia—that can launch atomic weapons from sea, air and land.

“I think they’ve watched the U.S. submarine force and its ability to operate globally for many, many years—and the potential influence that can have in various places around the globe,” says Adm. Thomas, “and they’ve decided to go after that model.”

China's nuclear-sub deployments, some naval experts say, may become the opening gambits of an undersea contest in Asia that echoes the cat-and-mouse game between U.S. and Soviet subs during the Cold War—a history popularized by Tom Clancy's 1984 novel "The Hunt for Red October."
Back then, each side sent boomers to lurk at sea, ready to fire missiles at the other’s territory. Each dispatched nuclear hunter-killers to track the other’s boomers and be ready to destroy them.

The collapse of the Soviet Union ended that tournament. But today, as China increases its undersea firepower, the U.S. and its allies are boosting their submarine and anti-sub forces in Asia to counter it.

Neither China nor the U.S. wants a Cold War rerun. Their economies are too interdependent, and today’s market-minded China doesn’t seek global revolution or military parity with the U.S.

Chinese officials say their subs don’t threaten other countries and are part of a program to protect China’s territory and expanding global interests. Chinese defense officials told foreign attachés that the subs entering the Indian Ocean would assist antipiracy patrols off Somalia, say people briefed on the meetings.