Underwater Diving and Scuba Diving

Image via Wikipedia

Scuba diving is a type of underwater diving. In this form of diving, the diver carries his/her own compressed air apparatus to breathe when he/she is under water. This allows them to stay under water for a longer period of time.

Originally, SCUBA was used as an acronym for self contained under water breathing apparatus. Typically, a scuba set consists of air hose, mouth piece, regulator, harness, back plate, and the tank. People perform scuba diving for personal as well as professional reasons. People dive for recreational purposes and there a many different disciplines like cave diving, wreck diving, ice diving, and deep diving.

Professional scuba divers are employed by companies to perform certain underwater tasks. These tasks include oil exploration, underwater welding, repair and inspection of boats and ships, salvage of wrecks, spear fishing, etc. It is not enough if air is simply supplied to a scuba diver. As the diver goes down, water also exerts pressure on the chest and lungs apart from the normal atmospheric pressure. It is approximately 1 bar for every 33 feet of depth. As such, the pressure of the inhaled air should match with the ambient pressure so that the lungs remain inflated. The regulator, that is part of a scuba set, ensures that air is supplied at ambient pressure. This enables the diver to inhale and exhale naturally and effortlessly at any depth.

Visibility is a problem for people under water as the refractive index of water is higher than that of air, but same as that of the cornea of the eye. The diving masks and helmets are designed to resolve this problem. They create an air space in front of the diver’s eyes. The error in refraction created by water is corrected when light travels from water to air through a flat lens. However, the objects appear about 34% bigger and nearly 25% closer than they actually are. As the field of view gets reduced, adjustment of eye-hand coordination is essential. Generally, divers who use corrective glasses will need to use the same glasses when wearing the mask.

How safe is scuba diving? It is a sport with risks like any other. It is the fear associated with drowning and the nervousness of using the scuba set that makes it seem riskier. Scuba diving is not as dangerous as some other activities that we take up without hesitation. The truth is that the number of fatalities is coming down every year, despite the fact that the number of divers has increased by leaps and bounds.

Daniel Blinman is writing for Scubaskool, a diving company offering dive course and divemaster internship

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Brutusreport Blogspot Sports Carnival - March 26, 2009

Oxygen toxicity occurs when the lungs take in a higher than normal O 2 partial pressure, which can occur in deep scuba diving. (Photo credit: Wikipedia)

Welcome to the March 26, 2009 edition of brutusreport blogspot sports carnival. If you are interested mostly in the sports material skim down to the Basketball, Football, and Other sections. Directly below are a number of related and unrelated articles and sales pages from our readers.


robert galway presents Fitness posted at robertgalway.com, saying, "Fitness is also about good nutrition, flexibility, relaxation, sleep, and more. Fitness is good for your heart, lungs, bones, and joints. And it lowers your risk for heart attack, diabetes, colon cancer, and high blood pressure."


Steve presents Where can I get cheap mailing lists from anywhere? posted at Mailing List Resources.


Steve presents Two Common Direct Mail Mistakes. and How to Avoid Them posted at Mailing List Resources.


David Porter presents Blog Content Brainstorming | Wordpress Master posted at Wordpress Master.


Jenny Smith presents Used Scuba Gear posted at Diving Scuba Vacation, saying, "Buying new or used scuba gear can be a daunting task for beginners because you need to be well aware of all the insand outs of the game, and this is something you can acquire through experience."


Jenny Smith presents Used Scuba Equipment posted at Scuba Diving Vacation, saying, "A scuba divers equipment is used to ensure safety. With that in make sure that you follow all the instructions properly.Most of the risks associated with scuba diving are likely only when the divers do not take proper care. Mentioned below are some safety guidelines following which you can avoid most of the risks."


Jenny Smith presents Scuba Diver Training posted at Diving Scuba Vacation, saying, "Scuba diving is a game that requires you to be very much skilled, and this is where scuba certification plays a very important role. In fact, in most scuba diving centers, it has been made mandatory to acquire certification. This is just to make sure you know the basics of the game and will not face difficulty diving deep into the water. In the past few years, lots of scuba diving centers have emerged that provide various kinds of certification. Take a look at a few of those."


Jenny Smith presents Scuba Diving Caribbean posted at Scuba Diving Vacation, saying, "scuba diving caribbean style"


robert galway presents Yoga posted at robertgalway.com, saying, "Yoga is more than just alleviating pain. It"


Gerard presents Ready Made Review Sites - Easy Affiliate Profits? posted at Making Money Online.


car donation presents Free Online Article Spinner Rewriter List posted at Glowicki ProBlogger - Blogging Tips, saying, "See list of best free online spinning and rewriting article tools with descriptions and tests. Make many unique articles for articles directorys for free."


Robert Galway presents Montreal and Toronto game Nite posted at robertgalway.com, saying, "The atmosphere at the Bell Centre in Montreal was electric as the Canadians and the Leafs meet for the 690 time in the long history between the two NHL arch rivals."


Y Niz presents How to Pack an Emergency Case for a Camping Trip (Outdoor Camping Equipment) posted at Outdoor Camping Equipment, saying, "Have you ever wondered if you needed to bring an emergency case? You need to bring one just in case. What if you get splinters? What if you get cuts? That is why you need to bring an emergency case."


Y Niz presents Balance MTR posted at Magnetic Tennis Elbow Brace, saying, "Tennis elbow is one of several repetitive injuries that can affect your elbow. The technical name for it is lateral epicondylitis.The pain stems primarily from the point where the tendon of the forearm muscle attaches to the outside (lateral epicondyal) of the elbow. It can also spread down your forearm and into wrist wrist."


zongo presents Seagate hard drives are not good posted at Computer Hard Disk Data Recovery, saying, "Computer Hard Disk Data Recovery show you why seagate hard drive sucks and are bad !"


Mike Stevens presents WHERE CAN I GET CHEAP MAILING LISTS FROM ANYWHERE? posted at Biz Data Lists.


robert galway presents Montreal and Toronto game Nite posted at robertgalway.com, saying, "The atmosphere at the Bell Centre in Montreal was electric as the Canadians and the Leafs meet for the 690 time in the long history between the two NHL arch rivals."

Basketball

Steve Patterson presents Three Ohio State Basketball Players Leaving? posted at BrutusReport, saying, "BJ Mullens talks about playing at Ohio State in the past tense after losing to the Siena Saints in the first round."


Steve Patterson presents Ohio State Women's Basketball Team Make the Sweet 16 posted at eFilmRoom, saying, "The Ohio State Men's Basketball team didn't make it past the first round and in the past neither has the women's team. But this year the women are advancing, beating Mississippi State to got to the Sweet 16."

Football

John Kezer presents First Fantasy - I'm Going on a Safari! posted at First Fantasy Online, saying, "Review of the horrendous officiating at this past Super Bowl. Fantasy sports blog and advice."


Steve Patterson presents Ohio State's James Laurinaitis Prepare for 2009 Pro Day on Campus posted at eFilmRoom, saying, "Ohio State star linebacker prepares for one of the most important performances of his life."


John Kezer presents First Fantasy - T.O. Signs with Bills posted at First Fantasy Online, saying, "An in-depth look into the Terrell Owens press conference following his signing with the Buffalo Bills. Owens recently did not attend Bills voluntary work outs."

Other

Wayne Cross presents My First Scuba Diving Vacation posted at First Scuba Diving Vacation, saying, "Everybody who dives has to have a first diving experience. Mine was about twenty years ago of the Big Island of Hawaii with a group of my friends. None of us were certified. How could we be, since it was our first time? If we had been certified, at least we could have said we had previously dived to the bottom of some community pool back on the mainland."


Jay Green presents Remote Computer Maintenance: RCM posted at Remote Computer Maintenance, saying, "Save Money"


That concludes this edition. Submit your blog article to the next edition of brutusreport blogspot sports carnival using our carnival submission form. Past posts and future hosts can be found on our blog carnival index page.

Technorati tags: brutusreport blogspot sports carnival, blog carnival, nfl football, nba basketball, ohio state athletics.

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