Archive for March, 2010

tech diving equiment and scuba diving

2 tech diving equiment and scuba divingA rebreather is a type of breathing set that provides a breathing gas containing oxygen and recycled exhaled gas. This recycling reduces the volume of breathing gas used, making a rebreather lighter and more compact than an open-circuit breathing set for the same duration in environments where humans cannot safely breathe from the atmosphere. In the armed forces it is sometimes called “CCUBA” (Closed Circuit Underwater Breathing Apparatus).

Rebreather technology is used in many environments:

* Underwater – where it is sometimes known as CCR = “closed circuit rebreather”, “closed circuit scuba”, “semi closed scuba”, SCR = “semi closed rebreather”, or CCUBA = “closed circuit underwater breathing apparatus”, as opposed to Aqua-Lung-type equipment, which is known as “open circuit scuba”.
* Mine rescue and in industry – where poisonous gases may be present or oxygen may be absent.
* Crewed spacecraft and space suits – outer space is, for all intents and purposes, a vacuum where there is no oxygen to support life.
* Hospital anaesthesia breathing systems – to supply controlled proportions of gases to patients without letting anaesthetic gas get into the atmosphere that the staff breathe.
Around 1620 in England, Cornelius Drebbel made an early oar-powered submarine. Records show that, to re-oxygenate the air inside it, he likely generated oxygen by heating saltpetre (sodium or potassium nitrate) in a metal pan to make it emit oxygen. That would turn the saltpetre into sodium or potassium oxide or hydroxide, which would tend to absorb carbon dioxide from the air around. That may explain how Drebbel’s men were not affected by carbon dioxide build-up as much as would be expected. If so, he accidentally made a crude rebreather nearly three centuries before Fleuss and Davis.

In 1853 Professor T. Schwann designed a rebreather in Belgium; he exhibited it in Paris in 1878.[4]

In 1878 Henry Fleuss invented the first certainly known rebreather using stored oxygen and absorption of carbon dioxide by an absorbent (here rope yarn soaked in caustic potash solution), to rescue mineworkers who were trapped by water.

The Davis Escape Set was the first rebreather which was practical for use and produced in quantity. It was designed about 1900 in Britain for escape from sunken submarines. Various industrial oxygen rebreathers (e.g. the Siebe Gorman Salvus and the Siebe Gorman Proto, both invented in the early 1900s) were descended from it; this link shows a Draeger rebreather used for mines rescue in 1907.

In 1903 to 1907 Professor Georges Jaubert, invented Oxylithe, which is a form of sodium peroxide (Na2O2) or sodium dioxide (NaO2). As it absorbs carbon dioxide it emits oxygen. In 1909 Captain S.S. Hall, R.N., and Dr. O. Rees, R.N., developed a submarine escape apparatus using Oxylithe; the Royal Navy accepted it. It was used for shallow water diving but never in a submarine escape[6]; it was used in the first filming (1907) of Twenty Thousand Leagues Under the Sea.

The first known systematic use of rebreathers for diving was by Italian sport spearfishers in the 1930s. This practice came to the attention of the Italian Navy, which developed its frogman unit Decima Flottiglia MAS, which was used effectively in World War II.

In World War II captured Italian frogmen’s rebreathers influenced design of British frogmen’s rebreathers.[6] Many British frogmen’s breathing sets’ oxygen cylinders were German pilot’s oxygen cylinders recovered from shot-down German Luftwaffe planes. Those first breathing sets may have been modified Davis Submarine Escape Sets; their fullface masks were the type intended for the Siebe Gorman Salvus. But in later operations different designs were used, leading to a fullface mask with one big face window, at first oval like in this image, and later rectangular (mostly flat, but the ends curved back to allow more vision sideways). Early British frogman’s rebreathers had rectangular breathing bags on the chest like Italian frogman’s rebreathers; later British frogman’s rebreathers had a square recess in the top so they could extend further up onto his shoulders; in front they had a rubber collar that was clamped around the absorbent canister, as in the illustration below.

Some British armed forces divers used bulky thick diving suits called Sladen suits; one version of it had a flip-up single window for both eyes to let the user get binoculars to his eyes when on the surface.

In the early 1940s US Navy rebreathers were developed by Dr. Christian J. Lambertsen for underwater warfare and is considered by the US Navy as “the father of the Frogmen”.[ Lambertsen held the first closed-circuit oxygen rebreather course in the United States for the Office of Strategic Services maritime unit at the Naval Academy on 17 May 1943

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2 Scuba Gear Resort   Online Store For Scuba And Snorkelinghttp://www.scubagearresort.com commercial advertising our great selection of high quality scuba and snorkeling gear and accessories. Our products are all high quality, good fitting, and affordable. Visit http://www.scubagearresort.com today! Video produced by http://www.visible.net

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2 Scuba Diver Girls Dive Lazy Days on the Scooba Do!http://www.scubadivergirls.com/ Occhi and Margo join Mikey and Jim on the Scooba Do to dive the Lazy Days wreck! It was very dark and murky that day and a bit cold but we had fun! Margo did her first back roll into the water and LOVED IT! Everyone had a great time! Thanks to Mikey and Jim for taking us out and treating us like queens!

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Guide To British Virgin Islands

The British Virgin Islands (BVI) is made up of many small islands in the Caribbean that is east of Puerto Rico. The BVI major islands are Tortola, Virgin Gorda, Jost van Dyke and Anegada. Tortola is the largest island and the center of most yachting activity. More than 60 islands make up the entire BVI, as there also are many secluded islands, islets, and cays. The lush tropical zone is a haven for both water-sports enthusiasts and those seeking to do nothing but sunbath and eat.

Today we look at the Caribbeans BVI. Rest assured that other island destinations are forthcoming. Rest assured that coverage of additional Caribbean hotspots is forthcoming.

Luxury Hotels in British Virgin Islands

Virgin Gordas Biras Creek Resort consists of 33 suites on Bercher Bay on a 140-acre estate. It is called a resort but it is more like a private community. The spa and restaurant at the harbor are fabulous. The resort just completed a million-dollar makeover before reopening in October. The ocean and garden suites are mini-mansions. Peter Island Resort has been named as one of the worlds top resort by both Travel + Leisure magazine and Conde Nast Traveler. A recent multimillion-dollar makeover enriched the resorts tropical charm. A new villa and a spa have been added.
The exclusive Guana Island resort is seven beaches spread over 850 acres with cottages and villages for only 32 guests. There are numerous water-related sporting activities as well as biking and hiking trails. The establishment is serious about making this resort a world apart, as the rooms do not have telephones or televisions.

Best Restaurants in British Virgin Islands

The Brandywine Bay Restaurant reserves four moorings for drop-in guests. However, the easily approachable moors support yachts up to 50 feet only. The menu, which is masterfully prepared by owner/chef Davide, changes daily. Additionally, check out Davides other place, the Capriccio di Mare, an Italian cafe promises the best pizza in the entire Caribbean! The Eclipse Restaurant and the Luna Lounge are a package deal. The Eclipse offers an eclectic-fusion cuisine (i.e., unique dishes) and an extensive wine list. The restaurant is located in Fat Hogs Bay of Penns Landing Marina on Tortola. The Pavilion at the Rosewood Dix Bay is an open-air restaurant that serves up elaborate breakfast and lunch buffets as well as a dinner menu of Caribbean-influenced dishes. The breathtaking view alone is worth the price of admission.

To Do in British Virgin Islands

Is there a better part of the world in which to charter a yacht than the BVI? Island hop; take a tour; go fishing; go sailing; go snorkeling, scuba diving, or skiing. BVI Yacht Charters Horizon Yacht Charters and North South Vacations are three seaworthy chartering companies to consider. Why not try some island hopping via a chartered helicopter? Island Helicopter offers custom flights and tours with hourly and daily rates available.

How about trying something that does not involve the water while staying in the Caribbean? There is a 92-acre national park on Tortola Island around Sage Mountain. The mountain peak is the highest of the Virgin Islands at 1,740 feet. There also are national park trails on Virgin Gorda Island. Parasailing is a fairly new sporting activity to the BVI. A parasailing boat leaves from Soper’s Hole Marina in the west end of Tortola from Leverick Bay on Virgin Gorda. The info was brought to you by of all places no less the BVI Scuba Organization .

Phoenix Delray
http://www.articlesbase.com/destinations-articles/guide-to-british-virgin-islands-320676.html

(Oregon, USA) Looking to catch some on our next camping trip, and get some river diving in at the same time. Please help!

While I do not know Oregon State law, I am willing to bet the answer is yes. You will likely need a fishing license and you may want to contact your state fish and wildlife about hunting crawdads while scuba diving. There are laws that concern harvesting with scuba diving and you may need to find out what they are.

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