SCUBA WEIGHT SYSTEMS
Scuba weight systems help to overcome the fact that the majority of divers float. Under normal circumstances you might expect floating to be a positive. However, if we are discussing buoyancy, ‘natural sinker’s’ need less lead to counter the effect of positive buoyancy - flotation - and descend in a controlled manner. Diving wetsuits and other scuba gear also adds extra flotation, so divers need extra weighting in order to descend underwater. Ideally, divers carry just enough to offset the tendency to float, using one of these basic styles of weight assemblies.
Scuba Weight Belt
The traditional nylon weight belt is the oldest method, and most commonly used system for divers to carry weights. Although some modern belts have fabric pockets, typically the lead weights are threaded into the nylon material. Ideally, they should be positioned symmetrically with the majority assembled towards the front of the belt to help offset the burden of a heavy tank. Care should be taken not to twist the nylon during assembly, but a good tip is to make one twist through the final piece of lead to avoid the weights slipping off the belt.
Weight-integrated BCD System
Many divers prefer not to hang a heavy belt around their waist, laden with lead. The integrated weight system eliminates this which people find more comfortable. There are advantages to integrating the weights into the BCD, but consider how much heavier that makes your scuba unit if you need to carry it.