Even though a certain amount of dives are necessary for your training, your instructor may ask you to do a few more to perfect your skills. You simply need to learn at your own pace, as some people are able to understand the techniques involved, and others take quite a bit longer. Safety is always a priority with your instructor, and your ability to master and perform certain skills must be at a certain level for they will feel confident you will be safe in the water.
All beginners must grasp certain skills prior to entering the ocean or a larger body of water. There is a phase of your training that is called open-water training, and you have to satisfactorily perform four open water dives. There are many components of this training which include diving in other bodies of water including lakes and the ocean.
Naturally you will be under the supervision of a qualified instructor, so it is not like you have to do this on your own. Those that are able to pass all of the tests will receive their open water certification card at the end. This card is your ticket to renting equipment to do your diving anyplace in the world.
The goal of confined water dives is to be able to successfully accomplish at least five dives in the pool. Each of the five dives that you make will have an increasing level of difficulty, making you learn more and become more competent as you go along. Basically, you will have to demonstrate the ability to do more and more things on each dive to proceed to the next. An example of this is requiring you to clean your mask while you are underwater opposed to being on the surface. Another task that must be mastered is breathing from the regulator of the person with you in case yours has a malfunction. These are the basic skills that are best practiced in the swimming pool rather than out in the open water.
Before you are allowed to begin any professional and accredited scuba training course, you will need to make sure you are healthy and fit enough to do it. This process is not the most stringent there is, and any person could simply not reveal information if they so choose. But that would really not be a good idea considering the serious possibilities. You are given a form to fill out regarding your health and fitness, and that is all it takes. The liability becomes all yours when you sign the paper saying that you are physically fit. If you have any reason to worry about anything on the questionnaire, you should check with your doctor. There are times when hiding health issues might be alright, but when it can be dangerous for you, and those around you, then it becomes a bad idea. Being underwater with scuba diving is an incredible thing to do, but only when there are no health issues to complicate matters.
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