A commercial diver usually works in oil rigs, ships, and other industrial vessels that require underwater jobs, such as welding, cleaning a ships hull, or drilling. This is a particularly dangerous diving job as there are so many hazards working with the heavy equipments used in industrial vessels. Industrial divers are also used in salvage operations and other underwater jobs that require working with hazardous equipments, and explosives If you want a rewarding career, scuba diving is for you. Another feature you should look for is that it should have a comfortable skirt with a close fit to your face and provides a good seal. A mask should also have an adjustable strap that can be locked in place. You should always remember that scuba diving is a relaxing and fun activity, choosing the wrong scuba mask will make it uncomfortable and annoying. This is not a bother because scuba diving is almost everywhere. Aside from making a difference, people go for scuba diving vacation due to various reasons. First, some of them want to fulfill their skills in photography by trying to capture the majestic species in the aquatic environment. Second, they simply like to experience the nerve-breaking feeling in the underwater. Research about currency information, visa requirements, language, customs, travel warnings and disease hazards in your destination must be made first to avoid untoward incidents. - Learn about water and diving conditions. Decide whether you are going for a boat or shore diving. - Remember that tropical reef biodiversity is similar to a tropical jungle. Most people who never took scuba lessons commonly think that scuba tanks are filled with oxygen. This is a common misconception and you should know that scuba tanks are never filled with pure oxygen. This is because, ironically, this gas that gives people life is lethal when breathed under pressure. This can cause oxygen toxicity and can cause instant death. It is hardly to encounter creatures such as sharks, piranhas and barracudas, but what if instead of them you encounter jelly fish, thick kelp forest, etc. If thinking such creatures would really alarm you, then scuba diving is really not for you. Are you prone to getting illness? Or do you easily get sick?