Generally speaking, being able to maintain a roughly neutral state in calm waters counts as entry-level, for instance, Chen Chong is at this level.
But he also needs to frequently adjust the BCD inflate and deflate, constantly regulating his breathing to control hovering, and he can't remain still for long, at most about ten seconds.
Even so, the vertical and horizontal displacement error is still more than 20 centimeters.
In fact, most divers are at this level, and many newly certified divers find static stable hovering difficult.
However, at this moment, Li Younan has been hovering next to that stone building for at least a minute or two.
In Chen Chong and their eyes, Li Younan's control over buoyancy seems near-perfect, giving the impression that he is maintaining balance solely by relying on his bodily sensations, his body seemingly completely still, as if becoming one with the ocean.
