Scuba diving requires special equipment. thisis a list of what is needed. The green things are needed first, amber second, and red last. There is also a guide to prices, from basic to top end manufacturers. You need basic equipment early on as possible, mask, fins, snorkel, and weights. in many areas, a knife, whistle, compass and torch are required by law, so these are essential pieces of safety equipment. A wetsuit would be ideally next, followed by the actual scuba unit itself. Other things like computers adn things can really wait until you are more experienced, but if you want one, why not, eh?