Is there a problem with the cruise ship?
Yu Liang inexplicably thought of the huge methane gas pools he had once seen, which were special devices created by the Barrel Men. If the cruise ship were to pass by these methane gas pools, it's likely it would be flipped over by the relentless explosions.
Of course, the function of these methane gas pools might not be as such, after all, the Captain wouldn't get close to this obviously problematic area unless he were foolish.
Soon, Li Geng provided an answer; he hadn't detected any Barrel Men in these waters. He targeted several areas and repeatedly bombarded them, but failed to flush out the Barrel Men.
The Barrel Men...
Seem to not be present in these waters at all, or perhaps they had already left this area.
They left behind dozens of Barrel Men corpses and did not look back as they departed the cruise ship's course.