Friday, December 25, 2015

Christmas Special! Learn to scuba dive in Hawaii. Only one offer available. Today only.

Christmas Special! Learn to scuba dive in Hawaii. Only one offer available. Today only. http://squareup.com/market/jcafa/item

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The Controlled Emergency Swimming Ascent (CESA) and why the way you learned it might not work

In the article, How to Preform the Controlled Emergency Swimming Ascent (CESA) , the author describes how a diver that runs out of air would...