American vessel is in the South China Sea for the subs.

The American ship "Impekkabl, which China has accused of illegal activities in their territorial waters, followed by Chinese submarines, told Associated Press on Wednesday by representatives of the Pentagon wished to remain unnamed.

According to the interviewed agencies' Impekkabl involved in observing the operation of U.S. military conduct in the South China Sea. "Impekkabl", said AP, formally a military ship, the vessel is staffed by civilian crew and does not bear arms. However, oversight of the "Impekkabl provides naval office dollars.

Representatives of the Pentagon also reported that people who were in the Chinese small vessels podoshedshih to "Impekkabl" dangerously close range, trying to damage the radar of American ships. To fight off the Chinese ship to a safe distance, they added, the crew "Impekkabl" had to use fire hydrants.

Recall that the March 8 "Impekkabl" surrounded by several small Chinese ships, crew members who demanded that the American seamen to leave the area of research. Chinese sailors showed Americans underwear, and threw in the "Impekkabl" wooden wreckage.

Chinese Foreign Ministry said that the ship has violated the Chinese and international laws, conducting unauthorized work in the 200-mile economic zone of China. The American side, in turn, insists that the ship was in international waters, and in an area where the incident occurred, China enjoys an exclusive right only for the extraction of minerals.