A U.S. nuclear-powered aircraft carrier has been spotted leaving the South China Sea for the wider Pacific Ocean, where it will participate in a large, multinational naval drill.

Meanwhile, the Chinese military did not deploy any of its aircraft carriers, two of them remaining pierside at bases, while another underwent maintenance inside a dry dock.

Newsweek‘s weekly update maps aircraft carrier movements in the Indo-Pacific region. As of February 7, the locations of 12 vessels were publicly available via military disclosures, as well as open-source imagery captured by satellites or ship-spotters. The U.S. military has the world’s largest “flattop” fleet with 11 in service. China ranks second with three.

U.S. Navy

USS Carl Vinson: Sibutu Passage

The Carl Vinson, which was previously operating in the South China Sea, transited the Sibutu Passage southward in the southwestern waters of the Philippines on Thursday, according to satellite imagery. The channel connects the Sulu Sea with the Sulawesi Sea.

The Carl Vinson carrier strike group will participate in an exercise, code-named Pacific Steller 2025, in the Philippine Sea, a marginal sea of the Western Pacific Ocean east of the Philippine Archipelago, beginning on Saturday, the U.S. Navy announced on Thursday.

A French carrier strike group led by FS Charles De Gaulle, as well as JS Kaga (a Japanese helicopter destroyer undergoing conversion into an aircraft carrier), will also take part in the exercise to advance coordination and cooperation between the three nations’ navies.

USS George Washington: Yokosuka, Japan

The George Washington remained pierside at Yokosuka naval base, its home port in the Greater Tokyo Area, as of Friday, according to a local government website that tracks port visits by American nuclear-powered warships.

USS Theodore Roosevelt and USS Abraham Lincoln: San Diego, California

The Theodore Roosevelt and the Abraham Lincoln remained at Naval Air Station North Island in San Diego, California, as of Thursday, according to a website that records the U.S. aircraft carrier fleet’s deployment history.

USS Nimitz: Eastern Pacific Ocean

The U.S. Navy said the Nimitz conducted “routine training operations” on Wednesday in the Third Fleet’s area of operations, which covers the Eastern Pacific Ocean.

USS Ronald Reagan: Bremerton, Washington

Photos published by the U.S. Navy showed the Ronald Reagan was pierside at Naval Base Kitsap in Bremerton, Washington, on Thursday.

People’s Liberation Army Navy

CNS Liaoning: Qingdao, Shandong

The Liaoning, which is China’s first operational aircraft carrier, was spotted at its home port in Qingdao in China’s eastern Shandong province on Tuesday, according to satellite imagery.

CNS Shandong: Sanya, Hainan

The second operational Chinese aircraft carrier, the Shandong, was spotted at its home port in Sanya in China’s southern Hainan province on Wednesday, satellite imagery showed.

CNS Fujian: Shanghai

The Fujian, China’s most advanced but yet-to-be-commissioned aircraft carrier, was inside a dry dock at Shanghai’s Jiangnan Shipyard in eastern China on Thursday, a satellite photograph showed.

Japan Maritime Self-Defense Force

JS Kaga: Philippine Sea

According to open-source data captured by the ship-tracking site MarineTraffic, the Kaga left Kure in Japan’s Hiroshima Prefecture on Thursday, heading toward the Philippine Sea.

JS Izumo: Yokohama, Japan

Japanese media said the Izumo, which is the Kaga‘s sister ship, will remain at a shipyard in Yokohama, southwest of Tokyo, for conversion into an aircraft carrier until 2027.

French Navy

FS Charles de Gaulle: Java Sea

The Charles de Gaulle departed from the Indonesian island of Lombok on Monday after a port visit. It was reportedly heading toward Singapore via the Java Sea.