Sean Knight didn't insist. The depth of the seabed was around sixty meters, and given Douglas Cooper's current physical condition and swimming skills, he could probably dive to the bottom—after all, he wasn't like ordinary people.
However, he guessed that Cooper couldn't stay underwater for long, so they would know as soon as he surfaced.
In fact, Sean Knight hadn't planned to dive right beneath the yacht; he intended to take advantage of the water's cover to dive directly near the unmarked small island they had just passed.
The Marine police work boat had already left the area, and now if Sean Knight dived over, they wouldn't detect him.
Those people were actually quite wary of Sean Knight's side, so as soon as they saw Douglas dive in, they immediately activated the radar, hoping to spot anyone approaching from underwater.
