The Pentagon dispatch the USS Antietam (CG-54) through the Taiwan Strait on Jul. 24. For the first time, China launched a Soar Dragon unmanned air vehicle (UAV) to monitor the warship.
Baiweiflight [CC BY-SA 3.0], via Wikimedia Commons
According to the news report, J-11 fighters were also scrambled as the cruiser enters the Taiwan Strait. The pilots issued a radio warning to a MH-60R Sea Hawk helicopter from HSM-77 during this period. The helicopter was flying on the west side of the imaginary line dividing the strait. It was transmitted on the VHF guard frequency.
During this 9-hours transit, up to 10 fighter sorties were activated by the Chinese side.
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