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An object has a positive buoyancy if it: displaces an amount of water that weighs more than the object itself (it is thus buoyant).
What is equalizing?What is clearing?
During the descent, air is added to air containing cavities to ensure that the pressure in the cavity is equal to the ambient pressure.
Which techniques are there to clear your ears?
When should you clear your ears?
Every meter before it becomes unpleasant.
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