Every diver must know how to attach a bolt snap to the dive equipment and how to tie a bungee cord to the harness. These knots must be secure but easy to cut with a knife or scissors.
The diving mask is a very important element our dive gear and often is not given the importance it deserves. Some water inside the mask does not present a hazard to the diver, but can make a good dive becomes a nuisance.
There are two types of materials used to manufacture fins: rubber and plastic. The main difference is that rubber is negative underwater and plastic have a buoyancy near to neutral underwater.
A bolt snap is a device that allows us to attach (clip off) some scuba gear to our diving harness. There are different materials which the bolt snap can be manufacture: stainless steel, brass or plastic. Of the three materials mentioned the most reliable is stainless steel.