the regulator is delivering air on demand (figure 3-24). Do not forget and breathe in first, as you might inhale various types of debris. Always exhale first through the regulator. 3. Repeat the process in step 2 with your back-up or alternate air source regulator. 4. Press your power-inflator button to be sure that air is flowing into your BC on demand. 5. Press your deflator/oral inflator valve button to be sure that air flows out of your BC on demand. When you have finished assembling your gear, you must make sure that the unit is secured and not in danger of falling over and injuring you or someone else or damaging the cylinder valve or regulator. If you are on a boat, place the unit back in the cylinder rack and secure the cylinder with the supplied elastic or other tie cord. If you are beside a pool, place your second stages and gauges inside the BC and lay the cylinder down on the tank strap (figure 3-25). If you are on a sandy beach, push the tank bottom deeply into the sand to make a secure base and wrap your hoses around the valve. Assembling Your Weight Belt How you set up your weight belt is important because it affects your comfort and safety. You want to have the correct amount of weight, and you want the weights to be balanced on the belt. With training and experience, you will know how much weight you need to wear based on the diving suit you are wearing. As a new diver, your instructor will help you determine how much weight you should wear. A rule of thumb for the amount of weight an average size person needs in salt water with a full 7 mm (1/4 inch) wetsuit is 10% of your body weight plus 2 kg (5 lbs). The length of your belt is also important. The excess tail of the belt that hangs out of the buckle must be long enough for you to grab it with your entire hand, and only that long. If you are using a flat 5-cm- (2-inch-) wide nylon web belt, with no elastic, and blockweights, string the weights on your belt using the following procedure: 1. Lay the weight belt out straight on a flat surface with the buckle facing up. 2. Bring the end of the weight belt up through a slit in the first weight and down through the other slit. 3. Position the weight so it will be over or slightly NAUI Scuba Diver 58 Diving Skills FIGURE 3-24. CHECK YOUR PRIMARY AND BACK-UP REGULATORS TO BE SURE THEY ARE DELIVERING AIR ON DEMAND. FIGURE 3-25. ONE WAY TO SECURE YOUR EQUIPMENT IS TO LAY THE CYLINDER ON ITS SIDE IF YOU WON’T BE USING IT IMMEDIATELY.
19116TC
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