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수심이 100m되는 깊은 물에서 30m쯤에서 중성부력을 맞출려면 어떻게 합니까?
![[Scuba Diving] Practice Neutral Buoyancy, which even beginners can easily do.](http://i.ytimg.com/vi/loG78EKXBoU/mqdefault.jpg)
![[Scuba Diving] Practice Neutral Buoyancy, which even beginners can easily do.](/img/tr.png)
수심이 100m되는 깊은 물에서 30m쯤에서 중성부력을 맞출려면 어떻게 합니까?