The fins allow you to move through the water almost effortlessly and with great efficiency instead of swimming with just using your bare feet and hands. The fins are strapped into your feet because of your powerful leg muscles that you can use for swimming and it provides far more effective propulsion than your arms can provide. There are also available dive centers in Costa Rica where you hire dive guides and these dive centers also offers scuba diving instructions. If you want to dive, but you need certification, Costa Rica is one of the best places to learn scuba diving. Not only that you can learn how to go scuba diving, but you can also enjoy the various marine species found in Costa Rica. Scuba Diving Jobs for Adventurous People As you begin your scuba diving lessons, you will first be trained as an open water diver, advanced open water diver, and rescue diver. In these scuba courses, you will only be limited to recreational diving and you are not allowed to teach or guide people to dive. You just can t imagine the enchanting beauty of the coral reefs and the aquatic creatures gliding in the sea. If you will just have the chance to take a glimpse of a real paradise, surely you will immediately grab it. One of the perfect activities today where you can spend your time with nature underwater is through scuba diving. NITROX mixes alters the air mixture by increasing the oxygen content and decreasing the nitrogen content. This is done by measuring the scuba tank content with NITROX analyzer. This is typically safer for most divers because this lessens the risk of nitrogen being trapped inside the body and cause bends. Are you ready to dive in warm waters several times each year at a costly resort or are you fascinated in diving a hardcore cold waters and explore the shipwrecks? It is important that you are able to answer questions like this for you to enjoy diving more. You should not be alarmed when scuba diving.