![]() ![]() In Figure 4, the red-tip needle shows current depth as 0 (sea level) and the black “maximum depth needle” shows the previous dive depth as 45 feet. These tools include:Ī means to record information on each dive (such as a pencil and underwater slate)Ī dive timer (a dive watch with a rotating bezel or a submersible timepiece with stopwatch function, Figure 3), andĪ depth gauge one with a maximum depth needle to indicate your dive’s deepest depth can be helpful. If you don’t dive with a computer, you must equip yourself with other tools to help ensure you do not violate your no stop limits, also known as NO DECOMPRESSION LIMITS (NDLs). If you’ve already purchased one, that’s great! But if you don’t own one yet for whatever reason (like cost or anticipated diving frequency), this-admittedly confusing-article might help explain the value of diving with a computer and why you might want to reconsider your equipment purchasing priorities.īefore we go too deep, a quick review as to why we calculate dives in the first place:Īs recreational divers, we are trained to make only NO STOP DIVES, meaning we can ascend directly to the surface any time during a dive without suffering an unusually high risk of decompression sickness.Ĭonducting no stop diving is no accident-it requires planning and vigilance to ensure depths, dive times, and surface intervals (SI) are within recognized limits. Of oxygen on divers, which has benefited us all.At the end of Open Water training, your instructor might have suggested a dive computer as one of your first scuba equipment purchases. ![]() Society Director, Occupational and Chris Adelaide,Īnd medical expertise in the development of PADI's enriched air nitroxĪ Special Dedication to Kenneth Donald, DSC, OBE, QP, DSc, MA, MD, FRCP, FRCPE, Emeritus of Medicine, Acknowledgments PADI Would Like to Acknowledge Professor Des Gorman, BSc, MBchB Medicine, ![]()
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