The destroyer Frank E. Evans was cut in two in a 1969 collision with the Australian aircraft carrier Melbourne during exercises in the South China Sea.
The U.S. Navy is actually testing a system that would let a user type words and convert it to blinker light. A receiver would read the flashes and convert it back to text.
Foreign Ministry spokesman Lu Kang told reporters on Monday that China dispatched planes and ships to demand that the guided-missile destroyer McCampbell leave waters around the Paracel Islands.