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Safety Stops: The Rule of Halves

At least one major scuba training agency (National Association of Underwater Instructors) has officially sanctioned this practice. Several leading dive computer manufacturers have incorporated deep stops into their algorithms.

According to a study done by researchers at the Divers Alert Network (DAN), a major finding when comparing various decompression models revealed that a deep safety stop, together with a shallow stop, yielded the lowest bubble grades (fewest silent bubbles). In fact, the optimal method for reducing post-dive bubble production (and therefore reducing the risk of DCS) was the combination of 1) an ascent rate of 30 feet [10 m] per minute with 2) a deep stop at about half the depth of the dive for 2.5 minutes and 3) a stop at 15 feet [5 m] for three to five minutes. 

The report concludes, “The introduction of a deep stop during decompression ascent appears to significantly decrease Doppler recorded bubbles and predicted gas tensions in the fast ‘tissues’ that may relate to actual gas exchange within the spinal cord. The authors conclude that such a deep stop may therefore significantly reduce the incidence of spinal cord-related decompression sickness.”


Source







The Dive Gallery

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West Palm Beach

Our August weekend in West Palm Beach included perfect conditions for diving Blue Heron Bridge, drifting Palm Beach County wrecks, and enjoying a shallow coastal-reef night dive. Stay tuned, we're going back soon! Perhaps in time to rejoin the Goliaths at the height of their autumn gathering.

In the meantime, live vicariously through the lenses of others....
















M. Butler


M. Butler





A. Gregory


B. Steen




                                             
B. Steen


J. Farrell


J. Farrell


 J. Farrell 


 J. Farrell
 


 J. Farrell 


J. Farrell


J. Farrell