Freedom of navigation means the freedom of merchants ships to go their lawful way without interference. The only interference experienced in the SCS area is by pirates. The FONOP action by USN are entire irrelevant to the freedom of navigation and hardly contribute to safety of merchant ships. So it is either to intimidate countries in the area or to satisfy ignorant Americans or both. Neither is a honourable purpose.
The increased presence of Chinese aircraft in the area to be expected in the near future will hinder the pirates.
The increased presence of Chinese aircraft in the area to be expected in the near future will hinder the pirates.