Many people think of scuba diving as just a swim in the water, but in reality it is a very exciting, dangerous, and potentially fatal sport and activity. There are many types of scuba diving, ranging from recreational to sport to career diving. Scuba Diving is just not a swim in the water, scuba requires certification, uses technical equipment, and there is a lot of risk involved with scuba diving.
Scuba, which is actually an acronym for “self-contained breathing apparatus”,
Allows divers to dive deeper and stay submerged longer. Scuba comes a long way from other forms of diving by using an air-tank and regulator. This is what allows them to stay under longer and dive deeper. Scuba originally began with military and commercial applications, where it is still used today. But now, by far the largest group of divers is “Recreational Divers”. These dives are practiced at depths of less than 130 feet, from these depths, divers can make a straight ascent to the surface. Diving beyond this limit requires advanced training. (Lawrence, 4)
Before recreational or sport divers can take a plunge into the water, they must complete a course in scuba diving and become certified. There are many scuba diving agencies, the largest being PADI, but there are many others, including the National Association of Underwater Instructors and the National Association of Scuba Diving Schools. All agencies require that participants be proficient swimmers, in reasonably good health, and at least 12 years of age. The course usually consists of classroom work, practice in a pool or confined body of water, and dives in open water. In the course, students learn to use diving equipment, to equalize air pressure as they descend, to swim efficiently underwater, to clear the mask if water leaks in, and to ascend safely. Because divers cannot talk to each other underwater, they also learn how to communicate underwater with hand signals. Scuba diving should always be practiced with at least one other person, and partners should remain together throughout the dive. Certification courses teach divers the rules and advantages of the buddy system. Diving partners learn to double-check each other’s equipment, share a single air supply, and assist one another should a problem occur. Neutral Buoyancy is an important skill taught in certification class. Neutral Buoyancy is a state, in which the individual neither sinks nor floats. In this weightless state, a diver conserves energy and air and keeps diving equipment off the bottom where it could be damaged.
Deep water and strong currents could lead to drowning. - stay away from the sea.
The First five weeks the student’s learn life saving, knot tying, underwater knot tying, basic first aid, and surf passages in small inflatable boats. Along with this is a 50-yard underwater swim, which must be completed and the students are often revived when they pass out. Also throughout out the whole six months of BUD/S (Basic Underwater Demolition School), the Seal Teams go through many torturous events and lessons. One of these being surf torture. This is where the entire class must wade into the surf zone to their waistline, then sit down with arms linked. Just to let you know the water in Coronado, California never gets above sixty-eight degrees during the summer and fifty-eight degrees during the winter. There the men with linked arms will sit there for hours at a time, soon the cold sucks out all of their body warmth and the whole class is shivering in unison as the waves crash over there heads.
Human Diving Response. Department of Biology, saint Louis University. Retrieved from starklab.slu.edu/PhysioLab/Diving.htm. April 18, 2011.
This force now can be used by the diver not only to go up, but to rotate and therefore perform various dives.
is not something parents tell a child to do for safety before walking on a diving board. This is a
There are an estimated 8,000 deaths per year in the United States from drowning. Near-drowning occurs anywhere from 2-20 times more frequently (for estimated 16,000-160,000 events per year)7. The definitions for drowning and near-drowning have for the longest time been very confusing to understand. Recent health officials have attempted to resolve some of this confusion by redefining drowning as “the process of experiencing respiratory insufficiency or difficulty following a submersion or immersion in a body of liquid.” Near-drowning has also been redefined as “survival from a drowning event which involved impaired consciousness or water inhalation for 24 hours or more”2. Both near drowning and near-drowning occur when someone experiences a submersion event. A submersion event is when someone, in this case a pediatric patient, experiences an unexpected submersion in water. When an unexpected submersion, regardless of water type (salt or fresh) occurs, the individual experiences breath hold, panic, and a struggle to resurface1. Humans, naturally, can only hold their breath for a short period of time. This prolonged breath hold results in hypoxia and eventually leads to involuntary gasping. As the individual attempts to gasp for air they sometimes aspirate7. This paper will attempt to look at the clinical presentation of a near-drowning patient who has suffered from a submersion event.
For those who are curious about fishing, but never seem to have any luck, here are a few simple guidelines to follow which will have you reeling them in in no time. Catching fish can be really easy to do if one has the correct equipment, location, weather, and presentation.
Surfing is the sport of riding a surfboard toward the shore on the crest of a wave. It is an amazing sport to learn and it gives the rider a hell of an adrenaline rush!! There are three major phases of surfing – paddling, push up and the standing position. This report will give you a full understanding of the correct techniques to use while surfing and it also describes the basic structure and function of the muscular-skeletal and cardio-respiratory systems of the human body. It will also describe the many different energy systems and how they change when surfing.
Several forces play significant roles in the movement of the human body through the water. The forces are drag, lift, gravity and buoyancy. Lift and drag are the main propulsive forces that are used by swimmers. Resistance, known as drag, can be broken into three main categories: frontal resistance, skin friction, and eddy resistance. The effect of buoyancy in swimming is best described by Archimedes’ principle: a body fully or partially submerged in a fluid is buoyed up by a force equal to the weight of the fluid that is displaced by the body.1 This effectively negates any effects that gravity might have on a swimmer. The rare exception to this is a swimmer with very little body fat, and this is overcome by keeping the lungs inflated to a certain degree at all times.
9. Check the water depth before entering. The American Red Cross recommends nine feet as a minimum depth for diving or jumping.
Snorkeling is one of the most common underwater activities now base on most people can go snorkeling which has lesser requirements than other underwater activities. The equipment of snorkeling are only a diving tube, a set of flippers and a mask. The people of people snorkeling was that people tried to collect some
Skydiving has been around since ancient Chinese times as a form of aerial stunts. Leonardo da Vinci and the Chinese are both credited for creating the parachute, but it was really in the 18th century when France both created it and used it by basically throwing themselves out of planes. Little did anyone know that skydiving would be one of the craziest sports today. Jumping out of a plane two and a half miles up into the sky would not be someone’s idea of a normal day. As bad as two and a half miles up in the sky is, try doing it traveling at a rate of one-hundred and sixty miles per hour with just a parachute to save you. To many people this would be a nightmare; but to some of us, it is the biggest thrill of our lives.
I will never forget the first time I went snorkeling, it was something I had been afraid to do up until the moment I touched the water. Beforehand all I could think about was what if I got attacked by a shark? I was too young to die and I felt like I was tempting fate. Then once I made the plunge into the water everything washed away, as if the waves carried the fear with them as they folded over me. I remember that day so clearly, rocking back and forth, up and down, I sat on a small glass bottom boat. The enormous ocean waves making me nauseas as I put my snorkel gear on. I hurried as fast as I could, knowing my nausea would go away as soon as I entered the water. This wasn’t the first time I have gotten sea sick, but it only shows up when the boat is sitting still. As soon as I got my equipment on I jumped into the water, fins first. I felt the sensation of goose bumps shivering up my whole body, tiny bubbles rolling over my body from breaking the surface, they ran from my toes upwards to break free at the ocean’s surface. Once the bubbles cleared, I looked around to see a new blue world I have never experienced before. I heard the sound of the ocean, mumbled by the sound of my deep breathing and the tanks of the more experienced scuba divers below me. It’s a very relaxing and peaceful sound, and if I had not been in such a new and unusual place I could have floated with my eyes closed for hours.
there collect liana vines and wind them into long cords. The men then scale six