To be precise, it was not sunk but occupied.
If Celestial Trade's goal was to sink the Ford aircraft carrier, then it would not be necessary to go through the trouble to drop the NS-90s there; two anti-ship missiles would be enough to do the job. Or a category six hurricane would also shred these steel ships into pieces.
However, for Jiang Chen's next plan, an aircraft carrier was necessary.
Therefore, this new generation of nuclear-powered aircraft carriers developed with the most cutting-edge technology in the UA was graciously accepted by Jiang Chen.
Celestial Trade did not only take control of the Ford but also an anti-submarine frigate, a guided-missile destroyer, and two supply ships. As for the other ships and submarines, they were sunk one by one after the Aurora-20s and Wings of Freedoms gained air supremacy.