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The PADI recreational dive planner, in "Wheel" format. The Recreational Dive Planner (or RDP) is a decompression table in which no-stop time underwater is calculated. [1] The RDP was developed by DSAT and was the first dive table developed exclusively for no-stop recreational diving. [2]
Weight belts are the most common weighting system currently in use for recreational diving. [17] Weight belts are often made of tough nylon webbing, but other materials such as rubber can be used. Weight belts for scuba and breathhold diving are generally fitted with a quick release buckle to allow the dumping of weight rapidly in an emergency. [7]
The profile of a dive is the variation of depth, measured as ambient pressure, over time during that dive. The actual location of the diver at any time is generally not considered, as the dive profile is a tool for dive planning and decompression status calculation.
The volume of the bag determines its lifting capacity: each litre of air inside the bag will lift a weight of 1 kilogram, or each cubic foot will lift about 62 pounds. For example, a 100-litre (3.5 cu ft) bag can lift a 100-kilogram (220 lb) underwater object.
If a weight harness is worn, or the BCD uses an integrated-weights system, the system is checked for correct assembly and function of clip release. A secondary check is to ensure that the buddy is familiar with the weight system of the diver being checked, and is able to operate it to ditch weights in an emergency. R - Releases
Carrying more weight than needed. Recreational divers do not usually need more weight than is needed to remain slightly negative after using all the gas carried. Professional divers may need to be heavy at the bottom to provide stability to work. Establish and use the correct amount of weight for the circumstances of the dive, taking into account:
Recreational divers are free to choose lesser buoyancy at their own risk. The shot weight should be sufficient to prevent a diver from lifting it from the bottom by over-inflation of the buoyancy compensator or dry suit, but not sufficient to sink the float if the slack on the line is all taken up.
The equivalent course offered by National Association of Underwater Instructors (NAUI) is the Advanced Scuba Diver. As a second level qualification, the AOWD certification level is aimed somewhere between the CMAS* Diver and CMAS** Diver qualifications, or between the British Sub-Aqua Club (BSAC) Ocean Diver and Sports Diver qualifications, although some differences occur.