Unlike conventional submarines, the Abyss Dragon was able to move up and down or navigate underwater with the help of four propulsion shafts. It made very little noise when it traveled underwater, so it didn't cause damage to the marine environment or drive away marine life. In this way, it allowed the people inside the boat to have closer contact with the marine life outside the boat.
This was a big advantage when the yacht hit the blue whale. The whale was about to surface, and as its body moved through the water, it created a current. There was no sound, and due to the whale's thick layer of blubber, it felt no pain when it collided with the boat. In this case, the whale did not notice anything unusual, so it continued to slowly rise to the water's surface.
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