The Theory Of Recreational Scuba Diving

We wrote this book to help you understand what is happening and why it happens before, during, and after a dive. Many of you will be preparing for an exam to become a dive professional. This is book tells you all you need to know, no more, no less. We will start off easy with a short introduction to the dive environment, where we look at tides, currents, waves, coasts, ecosystems. Why are there usually two tides per day, but only one Moon? Why do currents follow a certain pattern over the globe? What makes waves big, how do they break at the beach? How many different types of coasts are there, and why? How do marine biologists talk about the marine life they study and describe? Next, we go on with the physics of diving. We will keep the numbers to a minimum, and we promise: no formulas. We will show you how to use your experience as a diver and your common sense to understand and calculate everything. If you have a fear of physics and calculations, as we know many of you have, we will cure you from it. Give it a go. You will calculate buoyancy, air consumption, pressure, and partial pressure with a smile on your face. Well, perhaps that is too much to ask. Without sweating, let's settle for that. Next, we have a look at equipment, but because manufactures can give you so much more information than we can, and because we know you love shopping or looking at brochures, we keep it to the minimum. We tell you about tanks and tank maintenance, burst disks, balanced and unbalanced regulators, venture valves, pilot valves, up-stream and down-stream valves, and types of depth gauges. After this, we are ready to understand what happens in your body when you go diving. In the physiology of diving, we will have a look at blood, hearts, lungs, ears, and all the things that can go wrong. More importantly, we will give you the knowledge you need to respond when things go wrong, and even more importantly, how to avoid things going wrong. That does not mean you won't need an Emergency First Responder course. You do, because you need skills and practice. But you will know all you need to know. Finally, we can bring it together and talk about decompression theory, how tables and dive computers work. You will know how compartments, half times, M-values are used to make models for your tables or computers to keep you safe. We did even more. We made an on-line course with videos and many more exercises to help you study. This is also the place where people all over the world taking this course help each other with questions and answers. Visit the on-line course at www.udemy.com/easydivetheory/. You can visit the Facebook page of the book and the course at https: //www.facebook.com/easydivetheory?fref=t

We wrote this book to help you understand what is happening and why it happens before, during, and after a dive. Many of you will be preparing for an exam to become a dive professional. This book tells you all you need to know, no more, no less.We will start off easy with a short introduction to the dive environment, where we look at tides, currents, waves, coasts, ecosystems. Why are there usually two tides per day, but only one Moon? Why do currents follow a certain pattern over the globe? What makes waves big, how do they break at the beach? How many different types of coasts are there, and why? How do marine biologists talk about the marine life they study and describe?Next, we go on with the physics of diving. We will keep the numbers to a minimum, and we promise: no formulas. We will show you how to use your experience as a diver and your common sense to understand and calculate everything. If you have a fear of physics and calculations, as we know many of you have, we will cure you from it. Give it a go. You will calculate buoyancy, air consumption, pressure, and partial pressure with a smile on your face. Well, perhaps that is too much to ask. Without sweating, let's settle for that.Next, we have a look at equipment, but because manufactures can give you so much more information than we can, and because we know you love shopping or looking at brochures, we keep it to the minimum. We tell you about tanks and tank maintenance, burst disks, balanced and unbalanced regulators, venture valves, pilot valves, up-stream and down-stream valves, and types of depth gauges.After this, we are ready to understand what happens in your body when you go diving. In the physiology of diving, we will have a look at blood, hearts, lungs, ears, and all the things that can go wrong. More importantly, we will give you the knowledge you need to respond when things go wrong, and even more importantly, how to avoid things going wrong. That does not mean you won't need an Emergency First Responder course. You do, because you need skills and practice. But you will know all you need to know.Finally, we can bring it together and talk about decompression theory, how tables and dive computers work. You will know how compartments, half times, M-values are used to make models for your tables or computers to keep you safe.We did even more. We made an on-line course with videos and many more exercises to help you study. This is also the place where people all over the world taking this course help each other with questions and answers. Visit the on-line course atwww.udemy.com/easydivetheory/.You can visit the Facebook page of the book and the course athttps://www.facebook.com/easydivetheory?fref=ts

The Recreational Diver was chosen with care. We think that „recreational diving“ describes our activity much better than „Sport diving“ as it is for people who want to become divers and not for those who want to try diving. There is a gap to close. A gab in training, that has been weakened by greed. A gap in the training material that is outdated and a gap in the actual training, that is getting easier and easier, to be able to sell it to an even broader range of potential customers. No matter if they have the physical and mental prerequisites for the sport. It is time for a new training system, where quality is more important than quantity and where the individual is more important that the size of the course. Have a good dive.

This is the theory that you need to know for your open water course. In the manual you will get during your open water course there are questions you need to answer. The knowledge you need to answer these questions is in this little book. It is presented in same order as the questions, in short paragraphs. This way, you can prepare at home and spend less time on theory during your holiday.

You will find in this book some valuable and reliable lessons about safe diving The editors of and authors of this book are a cadre of scientists and physicians with broad experience and knowledge of diving physiology and decompression theory. As is often the case, it requires a group effort to succeed in advancing practical knowledge. The colloquialism "the whole is greater than the sum of its parts" is often true and the PHYPODE Reasearch Group epitomizes this concept. By logically grouping the various elements of diving science and medicine with provocative "food for thought" sections, the text offers valuable lessons to those interested in the current state of diving. Despite nearly 170 years of reasearch, the fundamenal nature of decompression stress remains elusive. As is well outlined in this book, great advances have been made to the practical elements allowing for safe diving. Nonetheless, there are glaring voids of knowledge related to the nature of bubble nucleation, its consequences and methods to ameliorate risk. The synergy exhibited in this text not only provides a foundation for what is known, it offers a glimpse of where research is taking us. - Professor Stephen R. Thom, Dept. of Emergency Medicine, University of Maryland School of Medicine This is a book for all diving fans who want to discover their passion through a scientific approach. EXCERPT Decompression illnesses (DCI), or as they are called more scientifically: dysbaric disorders, represent a complex spectrum of pathophysiological conditions with a wide variety of signs and symptoms related to dissolved gas and its subsequent phase change.1, 2 Any significant organic or functional dysfunction in individuals who have recently been exposed to a reduction in environmental pressure (i.e., decompression) must be considered as possibly being caused by DCI until proven otherwise. However, apart from the more obvious acute manifestations of a single, sudden decompression, individuals who have experienced repetitive exposures (e.g. commercial or professional divers and active recreational divers) may also develop sub-acute or chronic manifestations, even if subtle and almost symptomless. ABOUT THE AUTHORS Dr. Costantino Balestra started to study neurophysiology of fatigue then started studies on environmental physiology issues. He teaches physiology, biostatistics, research methodology, as well as other subjects. He Is the Director of the Integrative Physiology Laboratory and a full time professor at the Haute Ecole Bruxelles-Brabant (Brussels). He is VP of DAN Europe for research and education, Immediate past President of the European Underwater and Baromedical Society. Peter Germonpré is the Medical Director of the Centre for Hyperbaric Oxygen Therapy of the Military Hospital Brussels, Belgium).

Physiological and practical considerations of scuba diving in easy-to-read format.