Just as Yan Fei was using his Drone Avatar to size up the Red Dragon Submarine, the high-performance sonar on board the Red Dragon had also detected the Drone Avatar.
Although the Drone moved quickly underwater, the sound of the propeller pushing the water at the rear was still inescapable, so as soon as it appeared near the Red Dragon, it was immediately detected by the Red Dragon's sonar. The Drone's shape was a bit odd, and the sonar echo looked somewhat strange, leading the sonar operators on the Red Dragon to mistake it for a shark. Then, the "shark" they thought they saw swam near them and started circling around them as if observing them. At this point, the crew aboard the Red Dragon Submarine began to feel uneasy.
Inside the Red Dragon Submarine, the sonar operator reported, "Report, the suspicious object is approaching our vessel again."
The executive officer said to the captain, "I think this suspicious object is dangerous, should we launch a torpedo to destroy it?"
