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The Private, Exclusive Guide for Serious Divers Since 1975
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May 2019    Download the Entire Issue (PDF) Vol. 34, No. 5   RSS Feed for Undercurrent Issues
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Thereís an Easier Way to Dump Air from Your BC

from the May, 2019 issue of Undercurrent   Subscribe Now

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At the risk of trying to teach a grandmother to suck eggs, here's something to think about: During an ascent, do you lift the corrugated hose of your BC alongside your head to release air through the oral inflation valve? If so, why?

You may be familiar with old film footage of Jacques Cousteau's divers, using triple tanks and wearing little else than their Speedos, a mask and fins. That was in the 1970s, when recreational diving really took off, and one of the first things sport divers demanded was neoprene wetsuits to keep the chills at bay. Before that, divers wore sufficient weight to stay down, but because bodies are incompressible, their buoyancy stayed constant. Alas, the introduction of neoprene insulation with its tiny integral bubbles introduced a variable into the equation: buoyancy changed as the diver went deeper, and those bubbles got smaller....

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