The Recreational Scuba Training Council, which sets many industry standards, dropped its minimum age requirement for junior certification near the end of 1999. As a result, PADI, SDI, SSI and NASDS (which has since merged with SSI) dropped their minimum age requirements for junior certification to 10. Ten-year-olds can get a PADI Junior Scuba Diver, and 8-year-olds can enjoy PADI's Bubblemaker and Seal Team programs, which are held in a pool in less than 6 feet of water. SSI has a pool-only "Scuba Ranger" program for 8- to 12-year-olds.
Other problems arise when the concentration of metabolically active gases is increased. These range from the toxic effects of oxygen at high partial pressure,  through buildup of carbon dioxide due to excessive work of breathing, increased dead space ,  or inefficient removal, to the exacerbation of the toxic effects of contaminants in the breathing gas due to the increased concentration at high pressures.  Hydrostatic pressure differences between the interior of the lung and the breathing gas delivery, increased breathing gas density due to ambient pressure, and increased flow resistance due to higher breathing rates may all cause increased work of breathing and fatigue of the respiratory muscles. 
At ABC Scuba Diving Port Douglas we specialise in tailoring requirements to each individual guest. To assist during your research and planning, we have prepared a list of Frequently Asked Questions (and Answers), which you may find useful. Please click on the READ MORE below. Please note that we’re more than happy to answer individual questions; in fact, we prefer to provide personally tailored responses, as we understand each case or concern can often be unique. As such, please feel free to contact us directly on phone (07) 4099 6243 or email info@ Read More »