The Australian government has lodged complaints with the Chinese military following an encounter between two naval helicopters over the Yellow Sea.

Defence says an Australian Seahawk helicopter was forced to take “evasive action” after the Chinese helicopter moved dangerously close to it.

A large ship sails along a coastline.

HMAS Toowoomba was sailing through international waters, taking part in efforts to enforce UN sanctions on North Korea. (Supplied: Department of Defence)

The Australian helicopter launched from HMAS Toowoomba on Wednesday. It was sailing through international waters to take part in efforts to enforce UN sanctions on North Korea.

In a statement the ADF said that the Australian helicopter was approached by a Chinese military helicopter.

Chinese fighter jet released flares ‘very close’ to Australian aircraft

Defence Minister Richard Marles says the incident was “unsafe and unprofessional” and the government has made representations to China.

“The helicopter matched the ADF helicopter’s altitude before closing in to an unsafe distance,” it said.

“The helicopter moved slightly ahead, increased speed and then rolled towards the ADF helicopter, which required evasive action to maintain safe flight.

“This was an unsafe and unprofessional manoeuvre that posed a risk to our aircraft and its personnel.”

There were no injuries or damage sustained during the interaction and the ADF said the HMAS Toowoomba and the Seahawk helicopter were operating in accord with international law.

Complaints lodged

The ADF says it has “expressed its concerns” to the Chinese government over the encounter.

The ABC has been told the government lodged complaints in Beijing through the Australian Embassy, as well as with the Chinese Embassy in Canberra.

It is the latest in a string of similar interactions in recent years.

In October Australia lodged diplomatic protests with China after a Chinese fighter jet released flares close to an Australian surveillance plane in the South China Sea.

Chinese fighter deployed flares within 30m of RAAF jet in South China Sea

Defence reveals a Chinese fighter deployed flares in dangerous proximity to an Australian Poseidon jet while it was conducting a routine patrol of the South China Sea on Tuesday.

In a statement, Defence Minister Richard Marles said he “commended” the ADF’s “quick response to what was an unsafe and unprofessional interaction by the PLA-N [People’s Liberation Army-Navy]”.

“The work our ADF personnel do in asserting the global rules‑based order is vitally important and Australia is committed to undertaking activities in our region, in accordance with international law,” he said.

“Australia expects all interactions between defence forces to occur safely and professionally.

“Where that is not the case, we will express our concerns to the Chinese Government and we will call these actions out publicly.”

The Chinese military has deployed flares and released chaff near Australian aircraft before, as well as deploying sonar when Australian navy divers were in the water.