<https://forums.deeperblue.com/threads/help-for-a-new-guy.59136/>
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"I am more or less a beginner to freediving, it is something that I have become interested in over the last few months.  I have a quick question.  When equalizing the ears at depth, do I equalize them the same way I normally would, aboard a plane..."
<https://forums.deeperblue.com/threads/help-for-a-new-guy.59136/>