资料：USNS IMPECCABLE (T-AGOS 23) Ocean Surveillance Ship

USNS Impeccable is one of the five Ocean Surveillance Ships that are part of the 25 ships in Military Sealift Command's Special Mission Ships Program.

• Length:  281.5 feet
• Beam:  95.8 feet
• Draft:  26 feet
• Displacement:  5,368 long tons
• Speed:  12.0 knots
• Civilian:  25 contract mariners
• Military:  25
• Government-Owned

Pentagon: Chinese vessels harassed Navy ship
Obama administration officials cite days of 'increasingly aggressive' acts

AP associated press

WASHINGTON - The Defense Department charged Monday that five Chinese ships shadowed and maneuvered dangerously close to a U.S. Navy vessel in an apparent attempt to harass the American crew.

Obama administration defense officials said the incident Sunday followed several days of "increasingly aggressive" acts by Chinese ships in the region.

U.S. officials said a protest was to be delivered to Beijing's military attache at a Pentagon meeting Monday.

The USNS Impeccable sprayed one ship with water from fire hoses to force it away. Despite the force of the water, Chinese crew members stripped to their underwear and continued closing within 25 feet, the department said.

"On March 8, 2009, five Chinese vessels shadowed and aggressively maneuvered in dangerously close proximity to USNS Impeccable, in an apparent coordinated effort to harass the U.S. ocean surveillance ship while it was conducting routine operations in international waters," the Pentagon statement said.

The Chinese ships included a Chinese Navy intelligence collection ship, a Bureau of Maritime Fisheries Patrol Vessel, a State Oceanographic Administration patrol vessel, and two small Chinese-flagged trawlers, officials said.

"The Chinese vessels surrounded USNS Impeccable, two of them closing to within 50 feet, waving Chinese flags and telling Impeccable to leave the area," defense officials said in the statement.

"Because the vessels' intentions were not known, Impeccable sprayed its fire hoses at one of the vessels in order to protect itself," the Defense statement said. "The Chinese crew members disrobed to their underwear and continued closing to within 25 feet."

Emergency stop
Impeccable crew radioed to tell the Chinese ships that it was leaving the area and requested a safe path to navigate, the Pentagon said.

But shortly afterward, two of the Chinese ships stopped directly ahead of the Impeccable, forcing it to an emergency stop in order to avoid collision because the Chinese had dropped pieces of wood in the water directly in front of Impeccable's path, the Pentagon said.

Defense officials said the incident took place in international waters in the South China Sea, about 75 miles south of Hainan Island.

"The unprofessional maneuvers by Chinese vessels violated the requirement under international law to operate with due regard for the rights and safety of other lawful users of the ocean," said Marine Maj. Stewart Upton, a Pentagon spokesman.

"We expect Chinese ships to act responsibly and refrain from provocative activities that could lead to miscalculation or a collision at sea, endangering vessels and the lives of U.S. and Chinese mariners," Upton added.

Military-to-military consultations resumed
The incident came just a week after China and the U.S. resumed military-to-military consultations following a five-month suspension over American arms sales to Taiwan.

It also comes as Chinese Foreign Minister Yang Jiechi is due in Washington this week to meet with U.S. officials.

And it brings to mind the first foreign policy crisis that former President George Bush suffered with Beijing shortly after he took office — China's forced landing of a spy plane and seizure of the crew in April of 2001.

The Pentagon said the incident came after several other incidents involving the Impeccable and another U.S. vessel Wednesday, Thursday and Saturday.

It described those as the following:

On Wednesday, a Chinese Bureau of Fisheries Patrol vessel used a high-intensity spotlight to illuminate the entire length of the ocean surveillance ship USNS Victorious several times as it was operating in the Yellow Sea, about 125 nautical miles from China's coast, the Pentagon said, adding that the Chinese ship Victorious' bow at a range of about 1400 yards in darkness without notice or warning. The next day, a Chinese Y-12 maritime surveillance aircraft conducted 12 fly-bys of Victorious at an altitude of about 400 feet and a range of 500 yards. 
On Thursday, a Chinese frigate approached USNS Impeccable without warning and crossed its bow at a range of approximately 100 yards, the Pentagon said. This was followed less than two hours later by a Chinese Y-12 aircraft conducting 11 fly-bys of Impeccable at an altitude of 600 feet  and a range from 100-300 feet. The frigate then crossed Impeccable's bow yet again, this time at a range of approximately 400-500 yards without rendering courtesy or notice of her intentions.
On Saturday, a Chinese intelligence collection ship challenged USNS Impeccable over bridge-to-bridge radio, calling her operations illegal and directing Impeccable to leave the area or "suffer the consequences."