Any certified scuba diver should know the basic science of a safe dive profile, as well as the potential dangers caused by irresponsible diving. Recreational scuba diving normally does not involve divers going into decompression (deco), and having to stop during ascent. But even at the end of a short & shallow dive, a 3 minute safety stop is the best way to finish. A safety stop is not the same as a decompressions stop, and this page explains why.