China may be jamming US Navy jets off aircraft carriers in the Pacific - and the US will 'not look kindly on it'

US Navy/Mass Communication Specialist 3rd Class Kaysee Lohmann

An EA-18G Growler assigned to the "Rooks" of Electronic Attack Squadron (VAQ) 137 launches from the flight deck of the aircraft carrier USS Harry S. Truman (CVN 75) on February 28, 2018.

• The US Navy's USS Theodore Roosevelt aircraft carrier has reached the Philippines, and a pilot on board reported possibly having his aircraft jammed by the Chinese.
• Beijing has built and militarized artificial islands in the South China Sea, and is extremely touchy about US Navy ships sailing around them despite their legal status as lying in international waters.
• While jamming isn't anywhere near shooting, the provocative activity "could lead to an escalatory pattern that could be negative for both sides," and the US will "not look kindly" on the practice, according to an expert.

The US Navy's USS Theodore Roosevelt aircraft carrier has reached the Philippines, and reports from pilots on board the ship paint a troubling picture of growing tensions with China.

US officials told the Wall Street Journal early in April that intelligence officers detected China moving radar and communications jamming equipment to the South China Sea.

In addition to building and militarizing islands in the South China Sea, Beijing stands accused of encroaching on the Philippines' territorial waters, something recently exacerbated by the reported appearance of Chinese military planes on a reef near the island nation.

Part of the Roosevelt's mission in the Philippines was to demonstrate that if China crossed the line, the US, the Philippines' ally, would have its back. However, a troubling episode played out when the Roosevelt's pilots took off at sea.

A pilot flying a EA-18G Growler, the US Navy's electronic attack version of the F-18 carrier-based fighter jet, noticed something funny going on with his plane while airborne in the region.

China jamming US Navy carrier aircraft?

CSIS/Asia Maritime Transparency Initiative

Map shows China's maritime border claims and the islands it has moved to claim.

"The mere fact that some of your equipment is not working is already an indication that someone is trying to jam you. And so we have an answer to that," the pilot told GMA News Online.

"This is not something that the US will look kindly on or think they can overlook." Omar Lamrani, a military analyst at geopolitical consulting firm Stratfor, told Business Insider. "The US will likely seek to counter this in some way."

While Lamrani said that jamming "can be dangerous" if it targets navigation or communication systems, the US Navy's electronic attack aircraft can likely more than handle the challenge.

"The Growler is a very capable machine," Lamrani said. "I doubt the Chinese can really affect that aircraft that much. This type of system will try to annoy them and interfere with them, but I don't really think it will create a safety issues."

But while manned aircraft can usually fight back against signal jamming, and pilots in a cockpit can always use their own judgment if communications or navigation is lost, jamming could pose a serious threat to the US Navy's drones, as there's no one in the cockpit, according to Lamrani.

If China is jamming US Navy aircraft flying in international airspace at sea, it serve as yet another sign that Beijing may disregard international law and norms to defend its South China Sea land grab.

According to Lamrani, while jamming isn't anywhere near shooting, the provocative activity "could lead to an escalatory pattern that could be negative for both sides."