As of September 19, 2012, China has increased the number of its ocean surveillance, fishery, and other official boats patrolling the Diaoyu Islands waters to 16.
According to news from the Zhejiang Ocean and Fishery Bureau, more than 700 Zhejiang fishing boats are conducting fishing operations near the Diaoyu Islands waters. Some of the fishing boats are only 30 nautical miles away from yellow tail Island.
Source: Xinhua, September 20, 2012
http://news.xinhuanet.com/mil/2012-09/20/c_123737217.htm