Six US Coast Guard Ships Deploy to South China Sea

The United States has redeployed six Coast Guard Sentinel-class fast response cutters from the Middle East to the South China Sea, basing them out of Singapore and rotating them through Subic Bay in the Philippines — a move that analysts say reflects Washington’s strategy to maintain a military presence in the contested waters while reducing the risk of direct confrontation with Beijing.

Context

The six 154-foot (47-meter) patrol vessels, each displacing 300 to 400 tons and capable of 25 knots, are part of the newly formed Expeditionary Cutter Squadron of the US Coast Guard. Previously stationed in Bahrain, where they conducted maritime security, drug interdiction, and weapons interception missions in the Gulf of Oman and Arabian Sea, the ships were relocated as US-Iran hostilities escalated — their lack of missile defense systems made them vulnerable in high-intensity conflict zones, according to reports from The Wall Street Journal.

The deployment, approved at least through September 2026, marks the first time these smaller fast-response cutters have operated from Subic Bay on the Philippine island of Luzon, though larger Coast Guard vessels had previously visited the former US military base.

Key Developments

The move comes amid intensifying clashes between China and the Philippines in the South China Sea. On July 21, a Philippine sailor was injured in a skirmish with Chinese Coast Guard vessels, as reported by the New York Times. Just days earlier, on July 12, 14 countries including the US, Philippines, and Japan issued a joint statement marking the 10th anniversary of the 2016 Permanent Court of Arbitration ruling on the South China Sea — a ruling China has consistently rejected.

According to The Paper, a Chinese state-affiliated media outlet, military commentator Li Yaqiang described the US Coast Guard as a “second navy” and a “paramilitary force for advancing national will.” Li argued that the deployment of Coast Guard vessels rather than naval warships reveals US apprehensions about the use of military force in East Asia.

“Why send the Coast Guard instead of the Navy? This shows that the US also has apprehensions about the use of military force, especially in East Asia,” Li said, as translated from Chinese.

Euan Graham, a nonresident senior fellow at the Australian Strategic Policy Institute, offered a different perspective. “When the US Navy is clearly heavily committed in the Strait of Hormuz and the Middle East, the US Coast Guard has become a way to maintain a US presence,” Graham told the Wall Street Journal, as cited by Chin@Strategy.

Analysis

Analysts describe the deployment as a textbook example of “gray zone” strategy — using paramilitary forces (white Coast Guard ships) rather than naval warships (gray warships) to assert presence while reducing the risk of escalation. Even if confrontations or collisions occur, they can be characterized as law enforcement disputes rather than armed conflicts.

However, the military significance of the six small cutters is sharply debated. The China Coast Guard operates 280 vessels over 100 tons, with total displacement approaching 400,000 tons — dwarfing the six US cutters in both number and capability. Li Yaqiang asserted that “American meddling will not fundamentally change the overall situation in the South China Sea,” adding that China has “overwhelming strategic superiority” in the region.

At a July 22 press conference, Chinese Foreign Ministry Spokesperson Lin Jian stated that “the Philippines’ deliberate infringements and provocations are the root cause of maritime tensions,” and warned that countries not party to the South China Sea dispute “have no right to intervene in maritime issues between the parties concerned,” according to the Chinese Foreign Ministry.

The US Coast Guard, for its part, said in an official statement that “Expeditionary Cutter Squadron forces will integrate with US combatant commands to conduct exercises and maritime cooperative activities that enhance interoperability, strengthen strategic partnerships and advance shared security objectives throughout the region.”

What’s Next

The deployment raises several open questions. Will the six cutters remain beyond September 2026, potentially establishing a permanent US Coast Guard presence in the South China Sea? How will China respond operationally — by increasing its own Coast Guard presence in areas where US cutters operate? And what impact will this have on the ongoing Code of Conduct negotiations between China and ASEAN?

For the Philippines, the deployment provides a tangible demonstration of US support amid ongoing clashes with China. But it may also deepen divisions within ASEAN between countries that welcome US presence and those that prefer neutrality or closer ties with Beijing.

As both sides continue to engage in gray zone competition — the US with its Coast Guard, China with its Coast Guard and maritime militia — the South China Sea remains a flashpoint where law enforcement and military actions increasingly blur, and where even six small patrol boats can carry outsized strategic significance.