From The Daily Yomiuri:
A Chinese submarine tracked a U.S. Navy aircraft carrier for 28 hours in the Taiwan Strait in November, while the U.S. carrier launched an aircraft in response to prepare for any contingency, according to the Tuesday edition of Taiwan’s China Times newspaper.
According to the report, the Chinese Song-class submarine was operating southeast of Taiwan on Nov. 23 and shadowed the USS Kitty Hawk, which entered the strait while returning to Yokosuka after China canceled its long-scheduled port call in Hong Kong.
The Kitty Hawk observed the Chinese submarine, and after a U.S. antisubmarine patrol aircraft confirmed the Chinese submarine was keeping pace with the U.S. carrier by reducing speed and stopping, the U.S. vessel launched an aircraft to watch for possible hostile behavior by the Chinese Navy. [Full Text]